The 25 most popular Firefox add-ons in Firefox Browser Add-ons

Add-ons (also known as extensions) are small programs that run inside web browsers like Mozilla Firefox. They add extra features to the browser without having to download anything new. You can use extensions to make browsing faster, easier, and safer. Some extensions even let you do things like translate text on websites, search the web, and play games.

There are over 28,000 Firefox-addons and 480,000 themes, making it hard to find the best ones. so we have created a way to sort through all of them. Use the dropdown above to set different filters. Add-ons are sorted by number of active users.

To set even more advanced filters, and sort the Firefox add-ons differently, please visit our Advanced search tool. Note that Advanced search tool is only available to premium members.

519,738 results. Page 1 of 20790.
#1 uBlock Origin uBlock Origin
Publisher: Raymond Hill
User count: 6,363,930
Rating: 14,909
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
#2 Adblock Plus Adblock Plus
Publisher: Adblock Plus
User count: 4,866,115
Rating: 9,467
One of the most popular free ad blockers for Firefox. Block annoying ads on sites like Facebook, YouTube and all other websites. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
#3 Easy Screenshot Easy Screenshot
Publisher: Mozilla Online
User count: 2,029,052
Rating: 659
Capture a screenshot of the whole webpage, and save in your desktop in default.
#4 AdBlocker Ultimate AdBlocker Ultimate
Publisher: AdAvoid
User count: 2,015,468
Rating: 18,945
Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.
#6 Video DownloadHelper Video DownloadHelper
Publisher: mig
User count: 1,943,947
Rating: 22,856
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
#7 English (US) Language Pack English (US) Language Pack
Publisher: Mozilla Firefox
User count: 1,862,965
Rating: 624
The en-US language pack for Firefox.
#8 English (CA) Language Pack English (CA) Language Pack
Publisher: Mozilla Firefox
User count: 1,711,626
Rating: 54
Language pack for Firefox for en-CA
#9 DuckDuckGo Privacy Essentials DuckDuckGo Privacy Essentials
Publisher: DuckDuckGo
User count: 1,667,231
Rating: 1,824
Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.
#10 Cisco Webex Extension Cisco Webex Extension
Publisher: Cisco WebEx
User count: 1,411,953
Rating: 301
Join Webex meetings using Firefox ™
#11 Facebook Container Facebook Container
Publisher: Mozilla Firefox
User count: 1,210,072
Rating: 3,722
Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
#12 Ghostery – Privacy Ad Blocker Ghostery – Privacy Ad Blocker
Publisher: Ghostery
User count: 1,133,339
Rating: 3,856
Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.
#13 AdBlock for Firefox AdBlock for Firefox
Publisher: AdBlock
User count: 1,117,211
Rating: 2,982
The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.
#14 Privacy Badger Privacy Badger
User count: 1,096,423
Rating: 2,171
Automatically learns to block invisible trackers.
#16 To Google Translate To Google Translate
Publisher: Juan Escobar
User count: 981,278
Rating: 3,177
Right-click a section of text and click the Translate icon next to it to text translate or listen to it in your language.
#17 Dark Reader Dark Reader
Publisher: Alexander Shutau
User count: 952,174
Rating: 4,825
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
#18 Honey Honey
Publisher: Honey
User count: 949,507
Rating: 4,211
Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK.
#20 AdGuard AdBlocker AdGuard AdBlocker
User count: 892,969
Rating: 4,875
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
#21 Grammarly: Grammar Checker and Writing App Grammarly: Grammar Checker and Writing App
Publisher: Grammarly
User count: 853,754
Rating: 2,754
Improve your writing with Grammarly's communication assistance. Spell check, grammar check, and punctuation check in one tool. Real-time suggestions for improving tone and clarity help ensure your writing makes the impression you want.
#22 Norton Safe Web Norton Safe Web
Publisher: NortonLifeLock
User count: 755,097
Rating: 325
Protects your browser from online threats.
#23 Enhancer for YouTube™ Enhancer for YouTube™
Publisher: Maxime RF
User count: 702,871
Rating: 9,980
Take control of YouTube and boost your user experience!
#25 LastPass Password Manager LastPass Password Manager
Publisher: LastPass
User count: 689,236
Rating: 7,891
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
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