ABCDEFGH
1
2
Legacy Add-On (Don't sort alphabetically, use Ctrl+F)Daily usersLast UpdatedDeveloper StatusNotesWE alternativesFeature ParityWE notes
3
Adblock Plus3’055’9702025-10-28portedMostlyuBlock Origin performs significantly better, because it's more resource-efficient. (Doesn't have access to privileged pages)
4
uBlock Origin9’961’0372025-10-29portedFull
5
VideoDownloadHelper1’753’8022025-09-23portedVideo Downloader professionalShitty Privacy Policy
6
Video Downloader Prime
7
Easy Screenshot1’720’1582023-01-03portedFirefox Screenshots (FF56)Mostly
8
Awesome Screenshot PlusMostly
9
One-Click Screenshot
10
Dev Toolbar (Shift+F2) "screenshot --fullpage"
11
Win+Shift+S in Windows 10
12
NoScript Security Suite259’3452025-10-30portedPartial
13
Firebugwon't be portedMany features are built-in since Firefox 50Built-in developer toolsFullFirebug Gaps
14
https://developer.mozilla.org/en-US/docs/Tools/Migrating_from_Firebug
15
iMacrosProbably will be ported, since it is available on Chrome.
16
DownThemAll!193’0852024-10-24port in worksNecessary APIs are unavailable for some functionalities.Bulk Media DownloaderPartial
17
Download StarPartial
18
jDownloaderNot a Firefox add-on
19
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
20
YouTube Video and Audio DownloaderFullrequires manual installation of ffmpeg and native client
21
Greasemonkey163’3352024-08-07portedSome features may be missing from portViolentmonkeyMostlydt
22
TampermonkeyMostlyProprietary, poor privacy, has a "End-User License Agreement" at installation
23
Random Agent Spooferwon'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
Lastpass422’2972025-10-28portedbitwarden - Free Password ManagerPartialThe alternatives would require creating a new account.
25
Google Translator for Firefox163’4892024-04-25portedFor full pages (uses SAAS)Page TranslatorFull
26
For pieces of text (uses SAAS)Dictionary (Googleâ„¢ Translate) AnywhereFull
27
Tab Mix Plusport 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
28
Tab Auto RefreshLimited
29
Open Tabs Next to CurrentLimited
30
Always RightLimited
31
Select After Closing CurrentLimited
32
Download Flash and VideoportedVideo Downloader professionalPartial
33
FlashGot Mass Downloaderport in worksBulk Media Downloader
34
Download Master
35
Multiple File Downloader
36
YouTube High Definition156’9572024-09-02portedYouTube in HD (720p, 1080p, 1440p, 2160p)
37
HTTPS EverywhereportedSmart HTTPSFull
Different behaviour - HTTPS Everywhere uses a crowd-sourced ruleset to redirect, Smart HTTPS tries HTTPS on all sites the user visits
38
Element Hiding Helper for Adblock Pluswon't be ported"There are plans to integrate some comparable functionality into Adblock Plus"uBlock OriginMostly
39
Flagfox99’7042025-10-08port in worksWebExtension on beta channelCountry Flag +
40
Country Flags & IP Whois
41
Active Whois & Flags extension
42
Self-Destructing Cookieswon't be portedWE alternatives can't access localstorage (Bug 1388428).Cookie AutodeletePartialCan't access localstorage
43
lowcarbLimitedOn demand/startup only; Cookies only
44
Cookie SweepLimitedCan't access localstorage. Not automatic; only removes on demand
45
Classic Theme Restorerwon'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
46
Application MenuLimitedOnly implements the old style application menu, many features are still missing.
47
Stylish24’0282024-04-25portedWebExtensions can't style browser chrome, for that use userChrome.css.xStyleLimitedForked from Chrome's Stylish. Can't restyle UI, can't access about: pages.
48
StylusMostlyForked from Chrome's Stylish. Can't restyle UI, can't access about: pages.
49
Website Theme Manager (WebExtension)Limited
50
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.
51
FireFTPFilesystem integration is not available, but there are a good number of online FTP appsPartial
52
FireGesturesWE 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
53
GesturefyMostlyhttps://bugzilla.mozilla.org/show_bug.cgi?id=1360278 <- needs bug fix to develop equivalent in Linux and MacOS
54
smartUp GesturesMostlyhttps://bugzilla.mozilla.org/show_bug.cgi?id=1360278 <- needs bug fix to develop equivalent in Linux and MacOS
55
EPUBReader125’3742020-06-22portedFull
56
Session Manager1’5642021-12-16won't be portedhttps://www.mozdev.org/bugs/show_bug.cgi?id=26384Tab Session Manager
57
Reddit Enhancement Suite302’1482025-02-11portedFull
58
Disconnect68’1312024-02-29portedFull
59
QuickJavawon't be portedPlugins like Java are no longer supported by FirefoxJavaScript Toggle On and Off (WebExtension)LimitedOnly supports toggling JS.
60
Flash Blocker StrictLimitedOnly supports toggling Flash.
61
Image Video BlockLimited
62
Javascript ControlLimitedOnly supports toggling JS.
63
FoxyProxy207’8762025-04-23portedProxy SwitchyOmegaLimitedNo auto-switching based on URLs
64
Best Proxy Switcher
65
Password ExporterNecessary APIs are unavailable, so it will be delayed.
66
Add-ons Manager Context Menuwon't be portedabout:addons is off limits to extensions.
67
SQLite Managerwon't be portedWebapp alternatives exist.
68
All-in-One Sidebarwon'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.
69
Webpage SidebarLimited
70
Selenium IDE34’7112022-02-10won't be portedhttps://addons.mozilla.org/en-US/firefox/addon/katalon-automation-record/Mostly
71
Bulk Media Downloader10’5742017-09-04ported
72
Status-4-Evarwaiting on WE APIsNeeds toolbar API
73
New Tab Override60’8592025-03-05portedNew Tab TweakerMostlyThe WE provides a bit more functionality than the original legacy ext. Unable to redirect to about:home
74
Custom New TabsMostlyLocal files (paths beginning "file://" ) are not yet supported.
75
Change New Tab
76
newtab.urlEX
77
Print EditportedAvailable at new link ->Print Edit WE
78
Tab CenterportedSidebar API; use userChrome.css to hide tab bar.Tab Center ReduxMostlyPorted from the Tab Center Test Pilot experiment!
79
1Passwordportedchange logFull
80
ScrapBookwon'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.
81
82
Notes experimentLimitedHas sync and dark mode.
83
Sidebar NotepadLimitedHas encryption.
84
Web ScrapBookLimitedqr
85
Save Page WELimited
86
ScrapBook XportedUnder new linkWeb ScrapBookPartial
87
Image ZoomRotate and Zoom ImageLimitedCan't zoom image with mousewheel
88
Image ZoomerLimitedUse mouse button for resize img, no rotate
89
Zoom Image To FitDisplay in a tab or a window
90
Tab Groupswon'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
91
Sea ContainersLimited
92
TaboramaLimited
93
Text Link13’8542025-06-03ported
linkyFullnot supported on Linux? (it actually works)
94
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
95
Text Link WE
96
Text Link webext
97
Cookies Manager+won't be ported
98
Tree Style Tab169’4362025-10-28portedTree TabsMostly
99
Sea Containers
100
Tab Center Redux