List of Firefox add-ons with 100-999 ratings

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.

865 results. Page 1 of 35.
Easy Screenshot
#1, Easy Screenshot
Easy Screenshot
Mozilla Online
Capture a screenshot of the whole webpage, and save in your desktop in default.
3.89 (707)
3,096,037
Language: English (US)
#2, Language: English (US)
Language: English (US)
Mozilla Firefox
Firefox Language Pack for English (US) (en-US)
4.15 (756)
2,193,488
Language: English (GB)
#3, Language: English (GB)
Language: English (GB)
Mozilla Firefox
Firefox Language Pack for English (GB) (en-GB)
3.72 (917)
1,769,644
Cisco Webex Extension
#4, Cisco Webex Extension
Cisco Webex Extension
Cisco WebEx
Join Webex meetings using Firefox ™
2.88 (313)
976,267
Language: Español (ES) (Spanish, Spain)
#5, Language: Español (ES) (Spanish, Spain)
Language: Español (ES) (Spanish, Spain)
Mozilla Firefox
Firefox Language Pack for Español (ES) (es-ES) – Spanish, Spain
4.35 (629)
654,739
Language: Español (ES) (Spanish, Spain)
#6, Language: Español (ES) (Spanish, Spain)
Language: Español (ES) (Spanish, Spain)
Mozilla Firefox
Firefox Language Pack for Español (ES) (es-ES) – Spanish, Spain
4.35 (629)
654,739
Norton Safe Web
#7, Norton Safe Web
Norton Safe Web
NortonLifeLock
Protects your browser from online threats.
3.98 (357)
641,265
Language: Русский (Russian)
#8, Language: Русский (Russian)
Language: Русский (Russian)
Mozilla Firefox
Firefox Language Pack for Русский (ru) – Russian
4.41 (287)
615,430
Language: Português (BR)
#9, Language: Português (BR)
Language: Português (BR)
Mozilla Firefox
Firefox Language Pack for Português (BR) (pt-BR) – Brazilian Portuguese
4.59 (229)
568,228
Capital One Shopping: Save Now
#10, Capital One Shopping: Save Now
Capital One Shopping: Save Now
Capital One Shopping
Capital One Shopping instantly applies coupon codes to your shopping cart, helps you snag exclusive rewards when you shop at stores you love and compares prices on Amazon to other popular retailers. It's kinda genius.
4.46 (630)
560,629
Malwarebytes Browser Guard
#11, Malwarebytes Browser Guard
Malwarebytes Browser Guard
Malwarebytes
The fastest and safest web browsing experience. Secure your privacy by blocking trackers, blocking ads, and blocking malicious content.
4.28 (701)
518,164
Language: Español (MX) (Spanish, Mexico)
#12, Language: Español (MX) (Spanish, Mexico)
Language: Español (MX) (Spanish, Mexico)
Mozilla Firefox
Firefox Language Pack for Español (MX) (es-MX) – Spanish, Mexico
4.44 (325)
477,752
BetterTTV
#13, BetterTTV
BetterTTV
NightDev
Enhances Twitch and YouTube with new features, emotes, and more.
4.64 (855)
450,523
Language: Español (AR) (Spanish, Argentina)
#14, Language: Español (AR) (Spanish, Argentina)
Language: Español (AR) (Spanish, Argentina)
Mozilla Firefox
Firefox Language Pack for Español (AR) (es-AR) – Spanish, Argentina
4.27 (197)
391,544
Language: Español (AR) (Spanish, Argentina)
#15, Language: Español (AR) (Spanish, Argentina)
Language: Español (AR) (Spanish, Argentina)
Mozilla Firefox
Firefox Language Pack for Español (AR) (es-AR) – Spanish, Argentina
4.27 (197)
391,544
Language: Polski (Polish)
#16, Language: Polski (Polish)
Language: Polski (Polish)
Mozilla Firefox
Firefox Language Pack for Polski (pl) – Polish
4.64 (153)
384,507
English United States Dictionary
#17, English United States Dictionary
English United States Dictionary
Jorg K
English United States (en-US) Dictionary as shipped with Firefox 115 ESR.
4.38 (221)
377,891
Language: 简体中文 (Simplified Chinese)
#18, Language: 简体中文 (Simplified Chinese)
Language: 简体中文 (Simplified Chinese)
Mozilla Firefox
Firefox Language Pack for 简体中文 (zh-CN) – Simplified Chinese
4.57 (275)
369,002
Language: Italiano (Italian)
#19, Language: Italiano (Italian)
Language: Italiano (Italian)
Mozilla Firefox
Firefox Language Pack for Italiano (it) – Italian
4.35 (276)
366,807
Ecosia — The search engine that plants trees 🌱
#20, Ecosia — The search engine that plants trees 🌱
Ecosia — The search engine that plants trees 🌱
Ecosia Dev Team
This extension adds Ecosia.org as the default search engine to your browser — it’s completely free!
4.80 (724)
324,010
Firefox Translations
#21, Firefox Translations
Firefox Translations
Mozilla Firefox
Translate websites in your browser, privately, without using the cloud. The functionality from this extension is now integrated into Firefox.
3.64 (908)
319,718
French spelling dictionary
#22, French spelling dictionary
French spelling dictionary
Olivier R.
Spelling dictionary for the French language.
4.35 (204)
298,411
French spelling dictionary
#23, French spelling dictionary
French spelling dictionary
Olivier R.
Spelling dictionary for the French language.
4.35 (204)
299,058
French spelling dictionary
#24, French spelling dictionary
French spelling dictionary
Olivier R.
Spelling dictionary for the French language.
4.35 (204)
298,411
Language: العربية (Arabic)
#25, Language: العربية (Arabic)
Language: العربية (Arabic)
Mozilla Firefox
Firefox Language Pack for العربية (ar) – Arabic
4.40 (303)
294,345
865 results. Page 1 of 35.