20 Best Firefox Extensions for Power Surfing (2026 Update)
Which are the best Firefox extensions? Our first list in 2005 had 50 add-ons, from All-in-One Gestures to IE Tab and Linky. Firefox has since rebuilt its add-on system, and almost all of those old extensions stopped working in 2017. Firefox is still the best browser for power users who love extensions, especially now that it keeps supporting full ad blockers. Here are the 20 Firefox add-ons worth installing in 2026, grouped by what they do.
Quick answer: The best Firefox extensions in 2026 are uBlock Origin for blocking ads and trackers, Bitwarden for passwords, Multi-Account Containers for separating logins, Dark Reader for dark mode, Sidebery or Tree Style Tab for tab management, and SponsorBlock for YouTube. Install them only from the official Firefox Add-ons site.
Table of Contents
Privacy and security
- uBlock Origin – the most efficient ad, tracker and malware-domain blocker. Firefox still supports its full version.
- Bitwarden – free, open-source password manager that syncs everywhere.
- Firefox Multi-Account Containers – keep work, personal and shopping logins in colour-coded tabs that cannot see each other’s cookies.
- Facebook Container – isolates Facebook so it cannot follow you around the web.
- Privacy Badger – learns to block invisible trackers automatically.
- ClearURLs – strips tracking codes from links.
- Consent-O-Matic – answers cookie banners for you, choosing the most private option.
Tab management
- Sidebery – vertical tabs in a sidebar with panels and tree view. Firefox now also offers built-in vertical tabs.
- Tree Style Tab – shows tabs as a tree, so pages you open from a page stay grouped under it.
- Tab Session Manager – saves and restores whole sets of windows and tabs.
- OneTab – collapses all open tabs into a list to free memory.
Firefox now has built-in undo for closed tabs (Ctrl+Shift+T), so you no longer need the old Undo Closed Tabs extension. More tips in our guide to managing tabs in Firefox.
Reading and appearance
- Dark Reader – dark mode for every website, with brightness and contrast controls.
- Stylus – apply your own CSS styles to any site.
- Simple Translate – translate selected text or a whole page quickly.
- SingleFile – save a complete web page as a single HTML file for offline reading.
YouTube and media
- SponsorBlock – skips sponsor segments and intros in YouTube videos using community data.
- Enhancer for YouTube – control playback speed, volume and theatre mode.
- Video DownloadHelper – save videos you have the right to download.
Power user tools
- Violentmonkey – run user scripts that customise websites, the modern successor to Greasemonkey.
- Grammarly – grammar and spelling checks in every text box.
Tips for using Firefox extensions safely
- Install only from addons.mozilla.org. Look for the “Recommended” badge, which means Mozilla has reviewed the add-on.
- Check permissions. An extension that wants to “access your data for all websites” needs a good reason.
- Keep it lean. Each extension uses memory. Remove ones you have not used in a month at about:addons.
- Watch for ownership changes. Popular extensions are sometimes sold and turned into adware. Read recent reviews.
What happened to the classic Firefox extensions?
In 2017, Firefox 57 (Quantum) switched to the WebExtensions system shared with Chrome. Legacy add-ons such as All-in-One Gestures, IE Tab, Linky and Tab Mix Plus in its original form stopped working. Some returned as new versions; others were replaced by built-in Firefox features. Our older extension manager roundup shows how much has changed, and our look at popular browser toolbars covers the same story.
FAQ
Do Chrome extensions work in Firefox?
Not directly, but many developers publish the same extension for both browsers because they share the WebExtensions format.
Does Firefox still support uBlock Origin?
Yes. While Chrome moved to Manifest V3 and limited full ad blockers, Firefox continues to support the complete uBlock Origin.
Do Firefox extensions work on Android?
Yes. Firefox for Android supports a large and growing set of extensions, including uBlock Origin and Dark Reader.
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Thanks for this directory of extensions. I have tried some of them that i didnt know existed. Awesome.
NICE collection i currently use some but plan to use a few more from the list..!
Simply select any text on your screen, and you can get the search results immediately in Google (text, image, video, …), YouTube, Maps, Amazon, and more. No need to open new window (tab), unless that is what you want (see below).
Screenshot:
http://www.cleeki.com/firefox.html
I like Go Green Label….For environment!
FasterFox is a damaging addon for a few reaons.
It words by downloading data from links on the page you are browsing. That can include links which will perform actions, such as posting on forums or purchasing items (this will not usually occur in a well coded site, but it has been reported to happen).
It also loads content from people’s website continually, and becomes hugely expensive to the website owner due to the amount of bandwidth being used.
I would probably be a good idea to remove it from the list.
I think Google Toolbar isn’t a good idea if you want to be secure about your privacie life. all the bar you install on any navigator is watching where you go, what you like, and where you live.
With that, Google can influence you choosing his services because he knows how to speak to you.
Soory for my english.
If you need to do any css style sheet changes then editcss is a must. http://editcss.mozdev.org/
This is the best collection of the firefox extensions I have ever seen.
Great Job..
@ iusMateo
Ahah, poor Opera. It has much less functions that Firefox with 4 or 5 extensions. TabMix Plus, NoScript, Secure Login, FlashBlock and All-in-one-Sidebar, then you go with Autofill Forms and DownThemAll!, you get Opera, more or less, then you go with 50+ must have extensions (most of them not counted here) and you Opera 15.5 or something. Since they still are on Opera 9.5, it’ll take them a LONG time to get to Firefox.
OMG! You combine all this extensions in one browser and you get….
Opera =O
What about the following extensions?
Piclens: very very good. turns a borrrrring image search into a superb experience. must have add-on.
Stumble Upon: good for discovering new websites.
FlagFox: feel safer in the most secure browser. know where a web site’s server is!
Net Usage Item: measure ur broadband usage.
Cooliris Previews: for the people who like less windows and tabs.
Just got to the following site and search for the above extensions. sorry i could not get the links.
https://addons.mozilla.org/en-US/firefox/
FireFox Rocks but there should be three or so leading browsers on the web with each having a 30% share of the market. We shouldn’t be trying to take over IE’s reign we should just be trying to dampen it down somewhat so that there is no market leader.
Yea, for Web Devs: Firebug!!!! Also, YSlow to see how to improve a site’s performance.
What plugin(s) do I need to install to be able to “clip” stuff from youtube, send it to my email add, hdd or wherever so I can play it instantly and not have to wait for it to slowly download?
Cheers
nice list — these belong on my site; you should visit it and participate – you could contribute a whole lot; otherwise, i’ll do it myself. don’t worry about being too thorough, all site members can edit entries..think digg meets wiki.
reliablesource.org
Also Quick Translation
The most easy to use translation add-on.
Please consider our iMacros for Firefox for your next update to this list. I use it daily!https://addons.mozilla.org/en-US/firefox/addon/3863
proxies dont work anymore can someone give meh sumthin else non related to proxy? pleeeeze:)
Opps! I meant to say, “…I DON’T want to sort through in Google results…”
I guess Youlicit Firefox extension can fall under “Control Web Searches”. It’s a great tool for finding similar websites based on the one you’re on. You can save your findings as well just like Del.icio.us, but Youlicit takes to the next level by providing you relevant websites so you won’t have to search as much. I find myself using Youlicit at least twice a day to find something that I want to sort through in Google results. I’m sick of Google’s outdated results, to be honest.
firebug is much better than Web Developer
again, thx.
this will be my first site every day :)
Wowww.
So glad I found this, have installed a whole bunch haha
Thanks for putting this together :)
Please consider our Interclue addon for your next update to this list. Try it, I think you’ll like it.
My all-time top extension is Cooliris, for previewing links on a page in a separate window. Even though I don’t use Firefox on a regular basis, I sometimes fire it up specifically to use this plugin.
It is faster than actually following the link, which saves me a lot of time, especially if the link is not especially useful.
performaning’s pluin for blogs is the best ever i liked. Any ways i prefer to use flock browser over firefox.
Great list. Thanks for providing such a useful resource.
One suggestion please update the list according to latest extensions.
Thanks in advance.
I would recommend foxyproxy over switchproxy too.
Really nice list, thanks!
Firefox Extension Backup Extension (FEBE) and Fire Encrypter are also nice extensions.
The Diigo tool bar is also pretty cool~~
I would recommend foxyproxy over switchproxy; I’ve used both and foxyproxy has much more functionality – there’s also currently a way to implement proxy based on ip, and it’ll be integrated in the next version.
Great list. Thanks!
I have installed a few extensions from your listing, some of which I never knew existed! :)
tab mix plus includes the functionality of Sessionsaver, undoclosetab and Tab X.
one of my favorite extensions is easyGestures. it’s a mouse gestures extension but it has a gui so it makes it so much easier. i have like 8 different actions defined that i use regularly and about 7 more that i use once in a while. with regular mouse gestures (which i used to use) it is much harder to remember and perform that many actions with the speed and ease of easyGestures. it is also very customizable and lets u launch bookmarks or local programs or custom scripts, lets u transform it into a circular or linear menu with regular, little or no icons. theres a lot more options but u get the idea.
other extensions i like are:
CoLT (Copy Link Text)
editcss
enhanced bookmark search
googlebar lite
iget (start a download from an address)
Nuke Anything Enhanced
popup alt attribute (like in ie)
show image (like in ie if an image fails to load)
Super DragAndGo (drag a link to open in new tab, drag a text link to open the address or drag a word to search)
(all found on the mozilla site)
undotab can’t be use in ff 0.9 above
Hi,
I like 2 extensions form Firefox.
1. Html Validator (it have an internal validator and it can validate your source like w3.org)
2. Search Status (it is a litlle extension what check your webpage rank from Alexa and Google)
Regards
Very good list plus if you look at the comments, you can find few more!
Thanks. Thought I had them all, but realise I missed a few essentials…
Another extension that I really love is Super DragAndGo.
Its a really great extension that lets you drag a link and automatically open it in a new tab. When you are done, just close the tab with your mouse gestures and you are right back to where you started. Works on images too.
Nice list thanks… You missed a freind of mines extensions off..
https://www.activeinboxhq.com/index.php
Thanks for these, I tend to use the web developer toolbar, google toolbar and all in one side bar. Give them a wirl!
P2P for Firefox.
https://www.allpeers.com/
diigo is a killer — a big time saver for me
Well, you didn’t miss ANY of my favorites. AND, I picked up a few new ones to try. THANKS for the post!
can u suggest me a firefox plugin for capturing online web flash animations? i think firefox loses here with IE.
this a really extensive list. thanks… I am going to try some of them. My fav is the tab mix plus that saves my tab sessions. I also want to add Mouseless Browsing as a good extension that allows you to surf without a mouse if you have RSI.
Finally I found it, I was looking for the InFormEnter for my firefox but didn’t remember the name.
Thanks
Please do add Firebug. It’s unmissable!
Checkout the blueorganizer extension from adaptiveblue. Like one of our users said: Its like your bookmarks in high definition!
https://www.adaptiveblue.com/
Alex
Everybody … is there any extension to auto open many link from lists … ?
nice blog! keep it up!
btw anather handy extension is
Searchbar Autosizer:
with it you can alter the default size of the firefox’s searchbar.