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 Plus11’337’0522018-08-30portedMostlyuBlock Origin performs significantly better, because it's more resource-efficient. (Doesn't have access to privileged pages)
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uBlock Origin4’701’5792018-09-29portedFull
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VideoDownloadHelper3’089’4402018-08-01portedVideo Downloader professionalShitty Privacy Policy
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Video Downloader Prime
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Easy Screenshot1’903’6262017-11-06portedFirefox Screenshots (FF56)Mostly
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Awesome Screenshot PlusMostly
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One-Click Screenshot
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Dev Toolbar (Shift+F2) "screenshot --fullpage"
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Win+Shift+S in Windows 10
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NoScript Security Suite1’406’5312018-10-14portedPartial
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Firebug648’9562017-03-01won'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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iMacros258’0232018-07-09Probably will be ported, since it is available on Chrome.
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DownThemAll!536’7212016-09-29port 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 MP4This 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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Greasemonkey561’2352018-09-08portedSome 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 Spoofer50’9172016-09-21won't be portedAuthor won't port, though someone had started working on a fork that is a webextention. Others are free to join uMatrixMostly
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Lastpass784’2952018-09-05portedbitwarden - Free Password ManagerPartialThe alternatives would require creating a new account.
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Google Translator for Firefox572’1862018-10-14portedFor 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 Plus342’0402018-08-31port 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 VideoportedVideo Downloader professionalPartial
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FlashGot Mass Downloader254’0502016-12-01port in worksBulk Media Downloader
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Download Master
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Multiple File Downloader
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YouTube High Definition216’9022017-12-31portedYouTube in HD (720p, 1080p, 1440p, 2160p)
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HTTPS Everywhere483’8312018-09-19portedSmart 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 Plus185’8172017-04-12won't be ported"There are plans to integrate some comparable functionality into Adblock Plus"uBlock OriginMostly
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Flagfox216’3922018-10-06port 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 Cookies88’1522017-03-25won'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 Restorer193’5492018-07-17won'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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Stylish227’2082018-08-16portedWebExtensions 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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BetterPrivacywon'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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FireFTP56’2942017-01-20Filesystem integration is not available, but there are a good number of online FTP appsPartial
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FireGestures137’1592017-06-11WE 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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EPUBReader196’4992017-08-01portedFull
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Session Manager152’4432017-01-30won't be portedhttps://www.mozdev.org/bugs/show_bug.cgi?id=26384Tab Session Manager
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Reddit Enhancement Suite267’6412018-09-22portedFull
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Disconnect196’3592017-04-03portedFull
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QuickJava97’8102016-10-08won'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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FoxyProxy198’3752018-05-26portedProxy SwitchyOmegaLimitedNo auto-switching based on URLs
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Best Proxy Switcher
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Password Exporter118’7172017-07-04Necessary APIs are unavailable, so it will be delayed.
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Add-ons Manager Context Menu29’5842013-10-24won't be portedabout:addons is off limits to extensions.
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SQLite Manager78’8562015-02-28won't be portedWebapp alternatives exist.
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All-in-One Sidebar68’5292017-08-17won'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 IDE68’1872018-10-15won't be portedhttps://addons.mozilla.org/en-US/firefox/addon/katalon-automation-record/Mostly
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Bulk Media Downloader94’5282017-11-06ported
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Status-4-Evar80’1382017-08-21waiting on WE APIsNeeds toolbar API
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New Tab Override106’2232018-07-22portedNew 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 Edit36’8222018-02-11portedAvailable at new link ->Print Edit WE
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Tab CenterportedSidebar API; use userChrome.css to hide tab bar.Tab Center ReduxMostlyPorted from the Tab Center Test Pilot experiment!
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1Passwordportedchange logFull
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ScrapBook55’8352016-08-27won'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 X6’5452017-12-18portedUnder new linkWeb ScrapBookPartial
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Image Zoom53’4442013-05-27Rotate 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 Groups52’4512017-01-27won'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 Link61’6352018-07-29ported
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+18’1182017-07-22won't be ported
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Tree Style Tab116’3752018-09-09portedTree TabsMostly
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Sea Containers
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Tab Center Redux
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