firefox-webext-list
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Legacy Add-On (Don't sort alphabetically, use Ctrl+F)Daily usersLast UpdatedDeveloper StatusNotesWE alternativesFeature ParityWE notes
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Adblock Plus#NAME?portedMostlyuBlock Origin performs significantly better, because it's more resource-efficient. (Doesn't have access to privileged pages)
4
uBlock Origin#NAME?portedFull
5
VideoDownloadHelper#NAME?portedVideo Downloader professionalShitty Privacy Policy
6
Video Downloader Prime
7
Easy Screenshot#NAME?portedFirefox Screenshots (FF56)Mostly
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Awesome Screenshot PlusMostly
9
One-Click Screenshot
10
Dev Toolbar (Shift+F2) "screenshot --fullpage"
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Win+Shift+S in Windows 10
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NoScript Security Suite#NAME?portedPartial
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Firebug#NAME?won't be portedMany features are built-in since Firefox 50Built-in developer toolsFullFirebug Gaps
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https://developer.mozilla.org/en-US/docs/Tools/Migrating_from_Firebug
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iMacros#NAME?Probably will be ported, since it is available on Chrome.
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DownThemAll!#NAME?port in worksNecessary APIs are unavailable for some functionalities.Bulk Media DownloaderPartial
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Download StarPartial
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jDownloaderNot a Firefox add-on
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Download YouTube Videos as MP4#NAME?This add-on has been removed by its author.YouTube Download & Adblocker SmarttubeFullRequires nothing, also supports audio-only and various file formats
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YouTube Video and Audio DownloaderFullrequires manual installation of ffmpeg and native client
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Greasemonkey#NAME?portedSome features may be missing from portViolentmonkeyMostlydt
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TampermonkeyMostlyProprietary, poor privacy, has a "End-User License Agreement" at installation
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Random Agent Spoofer#NAME?won't be portedAuthor won't port, though someone had started working on a fork that is a webextention. Others are free to join uMatrixMostly
24
Lastpass#NAME?portedbitwarden - Free Password ManagerPartialThe alternatives would require creating a new account.
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Google Translator for Firefox#NAME?portedFor full pages (uses SAAS)Page TranslatorFull
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For pieces of text (uses SAAS)Dictionary (Google™ Translate) AnywhereFull
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Tab Mix Plus#NAME?port in worksIch bin nicht einverstanden mit "Hafen in Arbeiten". Ich glaube nicht, dass es etwas gibt und sie warten auf WE ändert sich. http://tabmixplus.org/forum/viewtopic.php?f=2FoxyTabLimited
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Tab Auto RefreshLimited
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Open Tabs Next to CurrentLimited
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Always RightLimited
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Select After Closing CurrentLimited
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Download Flash and Video#NAME?portedVideo Downloader professionalPartial
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FlashGot Mass Downloader#NAME?port in worksBulk Media Downloader
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Download Master
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Multiple File Downloader
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YouTube High Definition#NAME?portedYouTube in HD (720p, 1080p, 1440p, 2160p)
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HTTPS Everywhere#NAME?portedSmart HTTPSFull
Different behaviour - HTTPS Everywhere uses a crowd-sourced ruleset to redirect, Smart HTTPS tries HTTPS on all sites the user visits
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Element Hiding Helper for Adblock Plus#NAME?won't be ported"There are plans to integrate some comparable functionality into Adblock Plus"uBlock OriginMostly
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Flagfox#NAME?port in worksWebExtension on beta channelCountry Flag +
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Country Flags & IP Whois
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Active Whois & Flags extension
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Self-Destructing Cookies#NAME?won't be portedWE alternatives can't access localstorage (Bug 1388428).Cookie AutodeletePartialCan't access localstorage
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lowcarbLimitedOn demand/startup only; Cookies only
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Cookie SweepLimitedCan't access localstorage. Not automatic; only removes on demand
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Classic Theme Restorer#NAME?won't be portedRequired APIs are not available. Some features are available in userChrome.css file, and some may be added to Firefox 57.userChrome.cssMostly
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Application MenuLimitedOnly implements the old style application menu, many features are still missing.
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Stylish#NAME?portedWebExtensions can't style browser chrome, for that use userChrome.css.xStyleLimitedForked from Chrome's Stylish. Can't restyle UI, can't access about: pages.
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StylusMostlyForked from Chrome's Stylish. Can't restyle UI, can't access about: pages.
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Website Theme Manager (WebExtension)Limited
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BetterPrivacy#NAME?won't be portedThis add-on has been removed by its author.Flash is click to play by default now, so there is no risk of third-party tracking. Additionally Flash cookies are deleted with regular cookies by Firefox.
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FireFTP#NAME?Filesystem integration is not available, but there are a good number of online FTP appsPartial
52
FireGestures#NAME?WE extensions can't modify internal pages and AMO, so gestures won't work there.Foxy GesturesMostlyhttps://bugzilla.mozilla.org/show_bug.cgi?id=1360278 <- needs bug fix to develop equivalent in Linux and MacOS
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GesturefyMostlyhttps://bugzilla.mozilla.org/show_bug.cgi?id=1360278 <- needs bug fix to develop equivalent in Linux and MacOS
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smartUp GesturesMostlyhttps://bugzilla.mozilla.org/show_bug.cgi?id=1360278 <- needs bug fix to develop equivalent in Linux and MacOS
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EPUBReader#NAME?portedFull
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Session Manager#NAME?won't be portedhttps://www.mozdev.org/bugs/show_bug.cgi?id=26384Tab Session Manager
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Reddit Enhancement Suite#NAME?portedFull
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Disconnect#NAME?portedFull
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QuickJava#NAME?won't be portedPlugins like Java are no longer supported by FirefoxJavaScript Toggle On and Off (WebExtension)LimitedOnly supports toggling JS.
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Flash Blocker StrictLimitedOnly supports toggling Flash.
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Image Video BlockLimited
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Javascript ControlLimitedOnly supports toggling JS.
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FoxyProxy#NAME?portedProxy SwitchyOmegaLimitedNo auto-switching based on URLs
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Best Proxy Switcher
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Password Exporter#NAME?Necessary APIs are unavailable, so it will be delayed.
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Add-ons Manager Context Menu#NAME?won't be portedabout:addons is off limits to extensions.
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SQLite Manager#NAME?won't be portedWebapp alternatives exist.
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All-in-One Sidebar#NAME?won't be portedToggle sidebar in FF56. Sidebar menu in FF55. Switch position left/right in FF55. Sidebar API. Width limited and contents not persistent by design. FF57 open/close programmatically with user input. Toolbar API should allow a more complete port, but API won't be ready for FF57.URL in a BoxLimitedBasic sidebar web panel functionality.
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Webpage SidebarLimited
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Selenium IDE#NAME?won't be portedhttps://addons.mozilla.org/en-US/firefox/addon/katalon-automation-record/Mostly
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Bulk Media Downloader#NAME?ported
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Status-4-Evar#NAME?waiting on WE APIsNeeds toolbar API
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New Tab Override#NAME?portedNew Tab TweakerMostlyThe WE provides a bit more functionality than the original legacy ext. Unable to redirect to about:home
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Custom New TabsMostlyLocal files (paths beginning "file://" ) are not yet supported.
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Change New Tab
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newtab.urlEX
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Print Edit#NAME?portedAvailable at new link ->Print Edit WE
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Tab Center#NAME?portedSidebar API; use userChrome.css to hide tab bar.Tab Center ReduxMostlyPorted from the Tab Center Test Pilot experiment!
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1Password#NAME?portedchange logFull
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ScrapBook#NAME?won't be portedLooking at what the add-on does, it should be portable to WE: content script or downloads API to save pages, chrome.storage with larger storage quota, sidebar API... One thing that won't be possible will be filesystem integration, but the add-on can make its own fs using IndexedDB or chrome.storage, and urls can be opened via the blob: scheme
NotesLimitedVery basic sidebar note taker.
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Notes experimentLimitedHas sync and dark mode.
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Sidebar NotepadLimitedHas encryption.
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Web ScrapBookLimitedqr
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Save Page WELimited
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ScrapBook X#NAME?portedUnder new linkWeb ScrapBookPartial
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Image Zoom#NAME?Rotate and Zoom ImageLimitedCan't zoom image with mousewheel
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Image ZoomerLimitedUse mouse button for resize img, no rotate
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Zoom Image To FitDisplay in a tab or a window
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Tab Groups#NAME?won't be portedNecessary APIs are unavailable.Containers Experimenttaphttps://discourse.mozilla.org/t/-/13310/17?u=grahamperrin https://github.com/mozilla/testpilot-containers/issues/336#issuecomment-305962454
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Sea ContainersLimited
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TaboramaLimited
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Text Link#NAME?ported
linkyFullnot supported on Linux? (it actually works)
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Using Violentmonkey, install the script https://userscripts-mirror.org/scripts/show/7122 or use bookmarklet from it on demand https://gist.github.com/anonymous/21397ec37d110a64d495877e9f45fb13
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Text Link WE
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Text Link webext
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Cookies Manager+#NAME?won't be ported
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Tree Style Tab#NAME?portedTree TabsMostly
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Sea Containers
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Tab Center Redux
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YouTube MP3 Podcaster#NAME?
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Multifox#NAME?won't be portedThis add-on has been removed by its author.Containers ExperimentFullContainers are also available (built-in) on Nightly
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Containers On The Go
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ChatZilla#NAME?port in worksNecessary APIs are unavailable (Bug 1247628)Web apps like IRCCloudFull
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DOM Inspector#NAME?won't be portedBuilt-in alternative (Browser Toolbox) availableMostlyBrowser Toolbox actually has more features, but some people find it clumsy to use
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The Addon Bar (Restored)#NAME?Necessary APIs are unavailable.
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Gmail™ Notifier (restartless)#NAME?portedGmail™ Notifier +
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Checker Plus for Gmail
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Panel & Notifier for Gmail™
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Tamper Data#NAME?Header EditorNone of these replacemets adds more functionality than the built-in "Resend" in the devtools. Not really replacements.
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HTTP Header Live
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Download Manager (S3)#NAME?won't be portedWaiting for WE APIWX Download Status barPartialDoesn't work on privileged pages
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Decentraleyes#NAME?portedWebExtension available on the Development ChannelLocal CDNPartial
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Media Converter and Muxer#NAME?portedNew download link ->Media Converter and Muxer (WebExtension)Full
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Tab Scope#NAME?won't be portedNecessary APIs are unavailable
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RefControl#NAME?Referer ControlPartiallacks "same domain" setting and combining "fromSite › toSite"; includes 3rd party JS and Disqus in iFrame on config page
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OmniSidebar#NAME?won't be portedSee All-in-One Sidebar. Limited to one docked sidebar. Some of its functionality was built-in Firefox.
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Tile Tabs#NAME?ported Tile Tabs WEPartialLimited functionality. WE can only move windows, so every tab becomes a new window.
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Webmail Ad Blocker#NAME?portedFull
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HttpFox#NAME?won't be porteddevelopment stopped in 2014 (officially)F12 - Network, or Browser Console
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Google search link fix#NAME?portedFull
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I don't care about cookies#NAME?PortedDoes this mean a WE is "in works"?Add the filterlist to uBlock / ABPFullDeveloper: "it will cover 99% of cookie warnings"
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DownThemAll! AntiContainer#NAME?won't be ported
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Private Tab#NAME?Tracking possible progress.Containers On The GoLimitedErstellt temporäre Tabulatoren.
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Containers ExperimentLimitedContainer Tabs sind nicht die gleichen wie private Tabs, aber sie erlauben Cookies getrennt und gelöscht werden separat.
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gtranslate#NAME?port in works
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Add to Search Bar#NAME?Needs API (Bug 1268401)
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KeeFox#NAME?ported
Keepass Helper
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keepassxc-browser
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Keywi
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TitleBarLimitedVery bare bones replacement that can still fullfill the needs of some users if used with KeePass auto-fill feature
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LeechBlock#NAME?portedUnder new linkFocusBlocker (New)Partial
133
X-notifier (for Gmail,Hotmail,Yahoo,AOL ...)#NAME?portedNot possible to use scriptsMostly
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Roomy Bookmarks Toolbar#NAME?won't be porteduserChrome.css
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User Agent Overrider#NAME?won't be portedyesUser Agent SwitcherMostly
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Image Block#NAME?Image Video BlockFull
137
ImgLikeOpera#NAME?Image Video BlockLimited
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Extended Statusbar#NAME?Necessary APIs are unavailable.PRs welcome
139
InlineDisposition#NAME?portedInlineDisposition (WebExtensions)FullPort by different author
140
Display InlineFullRespects file extension
141
uMatrix#NAME?ported
Development channel version is WebExt
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Open Bookmarks in New Tab #NAME?won't be portedNative support in Firefox 57 (Bug 658245)Set browser.tabs.loadBookmarksInTabs = trueFull
143
Dark Background and Light Text#NAME?ported
WE portMostlysome limitations
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Dark Mode (WebExtension)MostlyCurrently makes many websites unusable by causing script errors
145
New Tab Tools#NAME?portedWE available in development channelMostly
146
Copy Plain Text 2#NAME?Copy PlainText
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Clippings#NAME?ported
due to WE limitations, the ported version will not have the full feature set.Mostly
148
FindBar Tweak#NAME?won't be portedFind API (FF57)Set findbar.modalHighlight and findbar.highlightAll to true in about:config
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Undo Closed Tabs Button#NAME?last code update in 2/2016Undo Close TabFull
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Undo Close Tab ButtonFull
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Context Search#NAME?Needs API to use built-in search engines (Bug 1352598)Contextsearch web-extMostlyThis webextension allows you to import the list of installed search engines, but doesn't synchronise it with the add-on
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Context SearchPartialThese alternatives ship their own list of engines (or are based on extra bookmarks); they can't be integrated to the already installed browser search engines.
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Context Search WebExtension
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Selection Context Search
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Bookmarked Searchsyncable, but no support for POST requests
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Font Finder#NAME?portedFont Finder (revived)Full
157
Simple Locale Switcher#NAME?Necessary APIs are unavailableUse about:config to change locale
158
Restart#NAME?won't be portedNative support (Bug 1366009)Press Shift + F2 to open developer toolbar; type 'restart' and hit Return
159
Gmail™ Notifier +#NAME?portedPartialno "persistent" for popups (Bug 1383979) support.
160
ShowIP#NAME?WhatIPPartial
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QuickDrag#NAME?Fire DragFull
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Glitter DragFull
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Tab Memory Usage#NAME?won't be portedNecessary APIs are unavailable.about:memory has memory per content process, and inside that per tab
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Cookie Controller#NAME?won't be ported
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Beyond Australis#NAME?won't be portedNecessary APIs are unavailable. It is possible to use userChrome.css to emulate the appearance though.userChrome.css - example?
166
VimFx#NAME?won't be portedVimium-FFPartialNot all keybindings are available and they are not customizable
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Saka Key?
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Open With#NAME?portedThe official WE port is going to require Python for Windows.External Application ButtonMostlyRequires additional program running in background.
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Open in Google Chrome BrowserLimitedRequires additional program running in background.
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Open in VivaldiLimitedRequires additional program running in background.
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Open in Microsoft Edge™ BrowserLimitedRequires additional program running in background.
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Open in Internet ExplorerLimitedRequires additional program running in background.
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Open in SafariLimitedRequires additional program running in background.
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Open in Tor BrowserLimitedRequires additional program running in background.
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FoxyLinkLimitedRequires additional program running in background.
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Privacy Settings#NAME?ported
WebExtensions can't directly modify about:config settings, unless there is an API. A replica of Privacy Settings could exist but it would output a user.js file with your custom settings for you to copy to the right location manually.User can set variables in about:config manually. Could also try ffprofile.com and Ghacks' config settingsPartial
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Imagus#NAME?ported
SuperZoomLimitedDoesn't always work as expected, needs some more work
178
Hover Zoom+ (I)LimitedDoesn't always work, still marked as experimental, last update 08/2016. Fork of Chrome version, not maintained now.
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Hover Zoom+ (II)?Tried to submit to AMO, but failed code review. [Updated: 2017-08-10, Users: 293,172]
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Mouseover Popup Image ViewerPartialUserScript
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ImagePreviewerLimitedRequires additional add-on to work; last updated 03/2016
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CanvasBlocker#NAME?portedNative support (Bug 967895)Canvas Defender
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BarTab Lite#NAME?won't be portedTab Suspender (Tab Unloader)
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Multi Links Plus#NAME?FoxyLinkPartial
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Snap Links Plus Mostly
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Vimperator#NAME?Some keybindings are unavailable.see VimFx
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Grab and Drag#NAME?won't be portedScrollAnywhere
188
Middle Mouse Button Scroll
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DragOnWeb
190
BMW - Broken Mouse Wheel
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Drag To Scroll
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Nuke Anything Enhanced#NAME?ported
Most ad blockers can selectively remove items from a page (permanently), uBlock Origin also has a new "zapper mode" for temporary removal (see WE progress above)Limited
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Main Content ExtractionLimitedReplicates the "Remove everything else" part for site's main content
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Use DeveloperTools built-in to FF: Right click, "Inspect element", Delete.PartialOnly covers "Remove Selection" (and only 1 element at a time), not "Remove everything else"
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Update Scanner#NAME?portedMostly
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Max Tabs#NAME?portedMax Tabs (Web Extension)MostlyPort by different author
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Image Search Options#NAME?portedReverse Image SearchMostly
Only limited to one custom extension, not as configurable
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Fast Image Research
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RevEye Reverse Image Search
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TiddlyFox#NAME?No filesystem apis.
201
Duplicate in Tab Context Menu#NAME?Available in FF57 (Bug 455722)Duplicate Tab ShortcutFull
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Duplicate tab
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New Tab Beside
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FoxyTab
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Bookmark Deduplicator#NAME?Removing a bookmark automatically removes all duplicates.Bookmarks OrganizerFull
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Multiple Tab Handler#NAME?portedWebExtension uses a separate popup instead of changing the native tabsTree Tabs
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MultiSelect TabsMostlyUses a sidebar to manage, doesn't offer all management options of MTH yet
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At Your Command
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Brief#NAME?portedWE portMostlySome limitations: no SQLite access, no livemarks for feed list, or installing a handler for feeds
210
Feedbro
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Bloody Vikings!#NAME?ported
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Open With Photoshop#NAME?portedExternal Application ButtonRequires installation of a native app
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Sage#NAME?No developer response to e10s/WE Github issueWE sidebars API should make a port easier.
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Save File to#NAME?Issue open w/o response; last commit 2/2016Save In...Limited to downloads folder. (Can do symbolic links [I believe] in the download folder)
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Suspend Tab#NAME?port in worksAuthor has ported his other extensions, and API has landed in 58Tab Suspender (Tab Unloader)PartialReplaces tabs with a lightweight page. This breaks session restore and bookmarking for suspended pages. Page state is not saved (forms, scroll location, etc...)
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Auto Unload Tab#NAME?API in 58Tab Suspender (Tab Unloader)PartialReplaces tabs with a lightweight page. This breaks session restore and bookmarking for suspended pages. Page state is not saved (forms, scroll location, etc...)
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Tab Unloader#NAME?Tab Suspender (Tab Unloader)PartialNo menus on tab.
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Auto-Sort Bookmarks#NAME?portedSort Bookmarks
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AutoCopy#NAME?Copy On Select
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Tab Rotator#NAME?portedTaboonPlusMostlyOnly changes forthground window if used in
mutliple windows, and not were it was activated
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Tab Wheel Scroll#NAME?won't be portedNative support (Bug 1285812)WheeltabPartialWorks by holding right click and scrolling on a page, instead of scrolling the tab bar. Still experimental.
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Prevent Tab Overflow#NAME?won't be porteduserChrome.css
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Lazarus: Form Recovery#NAME?port in worksThere is a Chrome version, but that hasn't been updated for a while. If your biggest cause of error is accidental backspace press, you can set browser.backspace_action to 2 in about:config to disable it.Textarea Cache Lite
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FormSave
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Simple Form History
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copyLinks#NAME?FoxyLink
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Keybinder#NAME?won't be portedNecessary APIs are unavailable
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Textarea Cache#NAME?portedTextarea Cache LiteMostly
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Smart Referer#NAME?portednetwork.http.referer.XOriginPolicy = 1 (same domain)Referer Control
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Slim Add-ons Manager#NAME?Chrome Web Store has several, so ports should be possible
231
Open in Browser#NAME?ported
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Perapera Chinese Popup Dictionary#NAME?dev didn't even respond to e10s update requests (last response dated 9/2015)Zhongwen: Chinese-English Dictionary
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Send to XBMC/Kodi#NAME?portedport evaluatedYoutube 2 KODIMostly
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Video Resumer#NAME?portedMedia URL TimestamperMostly
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Duplicate Tabs Closer#NAME?portedFoxyTabPartialTab menus manually only
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Close duplicate tabsPartialPage action manually only
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Tab Deduper
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Tab Slideshow#NAME?Port unknownTaboonPlusMostlyOnly changes forthground window if used in
mutliple windows, and not were it was activated
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No Resource URI Leak#NAME?won't be portedFixed in FF57 (Bug 863246)Full
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Click to Play per-element#NAME?
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Location Bar Enhancer#NAME?last commit 1/2016; e10s/WebExt issue openNavigate Up WE
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breadcrumbusPartial
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Websocket Monitor#NAME?port discussedwebext-websocket-monitorexperimental
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Linky#NAME?FoxyLink
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Open Selected Links
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Old Default Image Style#NAME?
247
Certificate Patrol#NAME?Needs API (Bug 1322748)
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Tab Preview#NAME?won't be portedNecessary APIs are unavailable
249
SSleuth#NAME?port in worksNeeds API (Bug 1322748)
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Expire history by days#NAME?portedHistory Cleaner
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History AutoDelete
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Disable Ctrl-Q Shortcut#NAME?Does not work on Linux until bug is fixed.Disable Ctrl-Q and Cmd-Q
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Disable Ctrl+Q
254
Show Selected Images#NAME?
255
Html5 Youtube Video Speed Controller#NAME?Developer hasn't updated since 2015, unlikely to portVideo Speed ControllerFullWE port of a more-featured Chrome Extension
256
CoLT#NAME?won't be portedCopy Link Text (WebExtension)Partial
257
Link Text and Location Copier
258
Format LinkMostlyAlmost full replacement
259
Zutilo#NAME?
260
Open in Private Browsing Mode#NAME?Open Page in Private Window
261
Incognito This Tab
262
Copy Link Text#NAME?willing to port but stuckCopy Link Text (WebExtension)Partial
263
Load Tab on select#NAME?Developer hasn't updated since 2015, unlikely to port.LoadTabOnSelectFull
264
Load on SelectPartialDoes not appear to support Linux.
265
HoldTab
266
Watch with MPV#NAME?issue open, but no response (yet)External Application ButtonPartialRequires installation of a native client app. Can't bind keyboard shortcuts. Awkward setup: requires specifying a 32x32 icon. Can only have one icon active at a time
267
Octotree#NAME?ported
268
Skip Redirect#NAME?portedOpen Link Directly (No Redirect)
269
Stay-Open Menu#NAME?won't be portedbrowser.bookmarks.openInTabClosesMenu = false (FF57)Bookmarks Manager and ViewerPartialWorks on bookmarks, not history.
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Enable Copy, Cut and Paste#NAME?Enable Right Click and CopyA bit aggressive, causes a lot of breakage.
271
Happy Right-ClickFull
272
OverbiteFF#NAME?Necessary APIs are unavailable (Bug 1247628)
273
Select like a Boss#NAME?Select Link TextMostlyDoes not work on "addons.mozilla.org" and "about:" pages due to WebExtensions API restriction.
274
Drag-Select Link Text
275
Puzzle Bars#NAME?won't be portedContainers Experiment
276
Simplified Tab Groups#NAME?port in worksWE port
277
Containers Experiment
278
bitwarden - Free Password Manager#NAME?portedFull
279
Click-to-Play Manager#NAME?
280
Copy HTML#NAME?even the project home (at Github) disappearedRight click on element > Inspect element > right click on selected row > Copy > Outer HTML
281
Delete Bookmark Icons#NAME?
282
TabSubmit#NAME?SubmitToBlank"Because webextensions aren't able to modify the Firefox preferences it's unable to guarantee consistent behaviour when middle-clicking or ctrl/meta+left-clicking on a submit button."
283
Vertical Tabs Reloaded#NAME?portedAPIs needed for full support:
· Bug 1332447 (Hide tab strip)
· Bug 1322060 (Attach session data to tabs – FIXED FF57)
· Bug 1343817 (Open sidebars programmatically – FIXED FF57)
Vertigo TabsLimitedImplemented as sidebar:
Extension cannot automatically open the sidebar on startup or hide the original tab bar without installing an additional WebExtension Experiment
284
VerTabs Deluxe
285
Open in Private Window#NAME?https://github.com/LouCypher/openinprivatewindow/issues/6Open Page in Private WindowLimited
286
Incognito This TabLimited
287
Autoplay Toggle#NAME?HTML5 Video Autoplay BlockerLimiteduser script
288
Twitch Fox#NAME?ported
289
au-revoir-utm#NAME?portedFull
290
Drag-Select Link Text#NAME?ported
291
VivaldiFox#NAME?portedFull
292
DisableBackspaceNavigation#NAME?won't be portedSet browser.backspace_action to 2 in about:configFull
293
ThinTabs#NAME?won't be portedNecessary APIs are unavailable.FF57 compact densityPartial
294
userChrome.css
295
ThinBookmarks#NAME?won't be portedNecessary APIs are unavailable.FF57 compact densityPartial
296
userChrome.css
297
Permanent List-all-tabs Button#NAME?userChrome.cssFull
298
Page Title in URL Bar#NAME?
299
Bookmark Tab#NAME?issue open, no response yet
300
InspectorWidget#NAME?won't be portedCan use the built-in element picker if you enable the Browser ToolboxFull
301
Link Ninja#NAME?FoxyLink
302
Don't close last tab#NAME?won't be portedSet browser.tabs.closeWindowWithLastTab to false in about:configFull
303
Copy Selected Links#NAME?portedFoxyLinkFull
304
Sidebars List#NAME?Native supportNative sidebar menu in FF55.Full
305
LastModified Date#NAME?
306
Sort and Search Customization Dialogs#NAME?won't be portedNecessary APIs are unavailable.
307
Download with youtube-dl#NAME?won't be portedExternal Application ButtonPartialRequires installation of a native client app. Can't bind keyboard shortcuts. Awkward setup: requires specifying a 32x32 icon. Can only have one icon active at a time
308
YouTube Download & Adblocker SmarttubeFull
309
YouTube Video and Audio DownloaderFull
310
Pentadactyl#NAME?inofficial builds are much younger (so "last update") is misleading heresee VimFx
311
Mile Wide Back#NAME?portedNew download link ->Mile Wide Back (WebExt)PartialDeveloper: won't work on about: pages
312
Blank Private Browsing Page#NAME?Portable to WebExtensions using the tabs APIuserContent.css
313
Request Control#NAME?portedFullded
314
Auto Shutdown#NAME?portedAvailable at new link ->Auto Shutdown (WebExtension)
315
tabSizeTooltip#NAME?won't be portedWould be possible to make a WE that appends size to tab's title.about:memoryHas memory per content process, and inside that per tab
316
ThinBars#NAME?won't be portedNecessary APIs are unavailable.Built-in compact theme (FF57)Partial
317
userChrome.css
318
Nicer Media Pages#NAME?portedMostlyMatch rules in webextension limited to only the "http", "https", "file", "ftp" and "app" URI schemes.
319
UTM Remover#NAME?portedFull
320
URL Manager#NAME?won't be ported
321
Lean URL#NAME?portedFull
322
OneTab#NAME?portedA Chrome version exists and work fine, so port should be possible.tabs2txtLimitedCopies your tabs' urls and gives you a window to copy them to clipboard.
323
Tab SaverLimited
324
TabberLimited
325
Drag & DropZones#NAME?portedAvailable at new link ->Drag & DropZones (Revived)
326
ScrollyFox#NAME?AutoScrolling
327
HTML5 Video Everywhere!#NAME?portedFull
328
NetVideoHunter#NAME?
329
Owl#NAME?ported
330
URL to QrCode#NAME?portedTab2QRFull
331
Thumbnail Zoom Plus#NAME?https://github.com/dadler/thumbnail-zoom/issues/248Hover Zoom+LimitedDoesn't always work, still marked as experimental, last update 08/2016. Fork of Chrome version, not maintained now.
332
Hover Zoom+ (Chrome)TBDTried to submit to AMO, but failed code review. [Updated: 2017-08-10, Users: 293,172]
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DuckDuckGo#NAME?portedcheck developer channel for beta buildsContext DuckDuckGoPartialContext search for selected text
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DuckDuckGo !bangsPartial!bangs for selected text (context menu)
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DuckDuckGo BangsPartial!bangs for selected text (context menu)
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Unofficial DuckDuckGo PlusFullseems to cover all (not tested)
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Profilist#NAME?help needed for porting
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No Squint#NAME?won't be portedNative support (Bug 332275)Zoom Page WE
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Always Ask#NAME?won't be portedNecessary APIs are unavailable.
340
Add-on Update Checker#NAME?won't be portedNecessary APIs are unavailable.
341
JS Print Setup #NAME?port in worksNecessary APIs are unavailable.
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Pick & Save Images#NAME?won't be portedBulk Media downloader, download star
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Menu Wizard#NAME?won't be portedNecessary APIs are unavailable.

Hiding context menu entries can be accomplished by finding each entry's id with Menu Wizard (click on the small properties icon beside each entry) and adding "display: none !important" rules to userChrome.css.
userChrome.css
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RequestPolicy#NAME?port in worksuMatrixFullWebExtension is beta & unsigned
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RequestBlockLimitedSupports only temporary blocking/unblocking
346
Grammalecte#NAME?ported
347
Check4Change#NAME?portedWachete - Monitor web changes
348
Distill Web Monitor#NAME?portedWachete - Monitor web changes
349
Locate in Bookmark Folders#NAME?Native support (Bug 469441)Bookmarks Manager and ViewerPrivacy handicap: Syncs favicons via Google API. Reported to be slow if you have many bookmarks.
350
Show Parent Folder#NAME?won't be portedNative support (Bug 469421)Bookmarks Manager and Viewer
351
Sidebar Bookmarks Search Pluswon't be portedBookmarks Manager and Viewer
352
Go Parent Folderwon't be portedNative support (Bug 469441)Bookmarks Manager and Viewer
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Progre#NAME?Load Progress Bar
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Website Theme Manager#NAME?portedAvailable at new link ->Website Theme Manager (WebExtension)
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Close All Tabs (Reloaded)#NAME?Close All Tabs ButtonMostly
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Close Other Tabs Button
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Clear Tabs
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Zoom Page#NAME?portedAvailable at new link ->Zoom Page WE
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Navigate Up#NAME?portedAvailable at new link ->Navigate Up WE
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Search Site#NAME?portedAvailable at new link ->Search Site WE
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Download Status Bar#NAME?
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NewScrollbars#NAME?won't be portedNeed support (bug 77790)
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AbcTajpu#NAME?portedAvailable at new link as AbcTajpu2, but has fewer features AbcTajpu2Mostly
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Doesn't have access to full unicdoe like AbcTajpuUnicode KeyboardMostly
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Add-on Compatibility Reporter#NAME?won't be ported
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Clean Uninstall#NAME?won't be portedBy default webextensions clear storage when uninstalled (extensions.webextensions.keepStorageOnUninstall).Full
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Advanced Locationbar#NAME?won't be ported"It is not possible to implement this extension using WebExtensions API."breadcrumbusPartial
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Fast Dial#NAME?won't be portedGroup Speed Dial
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Bookmarked Speed Dial
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Feed Sidebar#NAME?won't be portedDisplays new items from Live Bookmarks in a sidebar. Developer can be contacted about taking over development.
371
Open Image in New Tab#NAME?Open image in a new tabMostlyRequires permissions
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View Image in New TabMostlyDoes not require any permissions
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Zoom Image To FitFull
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JSONView#NAME?unlikely to be porteddevtools.jsonview.enabled = trueFull
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BetterStop#NAME?dev didn't even respond to e10s requests back then
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Browser View#NAME?Can't fint this anywhere but it's very useful. Allows developers to quickly open sites in other browsers for testing.See "Open With" alternatives.
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Super Drag#NAME?Glitter Drag
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Fire Drag
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SixOrNot#NAME?Due to WE limitations, a rewrite would mean losing more than half of the functionality
380
Disable WebRTC Indicator Overlay#NAME?
381
Downloads Window#NAME?
382
Rotate Image#NAME?Rotate and Zoom Image
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Exif Viewer#NAME?portedwxIF
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Hide Tab Bar With One Tab#NAME?
385
Image Resizer/Scaler#NAME?portedImage ZoomerMostly
386
Profile Switcher#NAME?won't be portedContainers ExperimentLimited
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Save Image in Folder#NAME?
388
Auto Copy 2#NAME?AutoCopy (WebExtension)Partial
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Copy On SelectMostly
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Iceweasel Branding #NAME?
391
About:about Button#NAME?might be ported if WE API permitsabout:about ButtonPartialCurrently can't open most pages (Bug 1269456)
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What about:..#NAME?
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Add Bookmark Here ²#NAME?
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Clear Site Cache#NAME?unclear; issue open
395
Configuration Mania#NAME?won't be ported
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ErrorZilla Plus#NAME?
397
Extensions Options Menu#NAME?
398
Googlebar Lite#NAME?won't be ported
399
Greasy Scripts#NAME?won't be ported
400
HTML Validator#NAME?portedFull
401
Image Context Menu#NAME?FoxyImagePartialmisses "reload" and "search"
402
Neo Diggler#NAME?clear address bar, navigate up ("breadcrumbs" from URL), find adress-bar URL in Archive.org, Web Citations, Google Cache (useful e.g. when a page doesn't load or is no longer found)Navigate Up WEPartialonly the "breadcrumbs" part covered
403
Wayback HelperPartialcovers only "find in Archive.org"
404
The ArchiverPartialonly "find in Archive.org" and WebCitations
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Pocketwon't be portedRemoved; partly integrated into FirefoxIn my PocketFulladds some features Firefox skipped
406
WallabaggerFullself-hosted alternative
407
Quick Locale Switcher#NAME?won't be portedswitch between locales, set preferred locale per site
408
Quick Locale Switcher 2#NAME?won't be portedFork of Quick Locale Switcher
409
Second Search#NAME?portedIssue open. Part of the functionality (one-off search) is already implemented in FF directly.
410
Server Switcher#NAME?DomainswitcherLimitedWould need some work
411
TableTools2#NAME?TableSorterPartialUserScript; no filter, no copy-as
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TagSieve#NAME?
413
Wikiwand#NAME?portedWikiWand (webextension port)Full3rd party port
414
OpenDownload²#NAME?won't be ported
415
Privacy Badger#NAME?ported
416
It's All Text#NAME?
417
MEGA#NAME?A Chrome version exists so port should be possible
418
Linkification#NAME?Last Update 2010
419
Check Placeswon't be ported
420
Live Http Headers (clone)#NAME?after last update 2011 picked up by other developer as cloneDeveloperTools › Network (built-in)
421
Linkificator#NAME?portedFull
422
Save-To-Read#NAME?Not sure if it will be updated. If anyone knows a replacement for it, please add.
Last life-sign of dev on AMO in 10/2015.
Tab SaverPartial
423
close-other-tabs-by-double-click#NAME?Clear Tabs
424
Close Other Tabs ButtonPartial
425
PassIFox#NAME?port in works
426
Anti-Alias Tuner#NAME?
427
Wiktionary and Google Translate#NAME?Offers a lot of features that don't exist in other translation extensions. Offers Wiktionary definition, pronunciation key, Google Translate and pronunciation in English and another language of choice. Which makes it possible to use it as an English-English dictionary AND foreign language-English dictionary at the same time.
No response from developer on e10 even, so it's unclear if this is still worked on.
Quick DictionaryMostlyMostly UI and ease-of-use difference, with small differences in functionality. Supports bilingual dictionary and Google Translate, but no side-by-side definitions. Cannot set up to open by simply selecting the text. Extention works in a new window rather than a simple pop-up. Seems not to work on some websites and text fields.
428
Instant Translate: Ultimate TranslatorLimitedOnly translation. No Wiktionary. No pronunciation key. No dual-language translation. No English monolingual dictionary.
429
translaLimited
430
Nagios Checker#NAME?Source repository has been removed, no recent activity seen from the author; most likely droppedimoinFull
431
Cleanest Addon Manager#NAME?No information available.?Hilite also legacy.
432
Calomel SSL Validation#NAME?port in works"Sorry for the bad news. Thanks for everyone's support. When we are able to query the TLS information using WebExtensions we will try a re-write of this addon sometime in the future." - from addon page. bug 1322748.?Cypher fox also legacy.
433
Blank your monitor + easy reading#NAME?No recent activity by the author since 2015 on wordpress blog. Firefox Reader ViewPartial
434
Newsfox#NAME?Support siteFeedbroPartialSage + Bamboo are legacy also.
435
Save Images#NAME?Developer commentDownload all imagesPartialdai saves current tab only.
436
Speed Dial#NAME?No information available, already incompatible.Group Speed DialPartialColour options missing.
437
Bookmarked Speed DialPartialColour options missing.
438
Toggle Animated Gifs#NAME?No information available.?
439
Wired Marker#NAME?No information available.?
440
GNU_Terry_Pratchett#NAME?ported
441
CheckFox#NAME?CheckThemAllFull
442
Password hasher#NAME?Quantum HasherFull
443
Hackbar#NAME?New HackbarMostly
444
FireTitle#NAME?portedAvailable at new linkCrappy FireTitleMostly
445
FoxySpider#NAME?Bulk Media DownloaderPartial
446
Download StarPartial
447
HighlightAll#NAME?portedFull
448
Context Highlight#NAME?won't be portedHighlightAllFull
449
ScriptSafe#NAME?portedFull
450
FireSizer#NAME?WindowSizerFull
451
Show the Image#NAME?Largest imageFull
452
#NAME?
453
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