https://addons.mozilla.org/en-US/firefox/search/?sort=users&type=extension To use these add-ons, you'll need to download Firefox Dismiss this notice Firefox Browser Add-ons * Extensions * Themes * More... + for Firefox + Dictionaries & Language Packs + Other Browser Sites + Add-ons for Android Log in Search [ ] Search 26,593 extensions found Filter results Sort by[Most Users ] Add-on Type[Extension] Badging[Any ] Search results * uBlock Origin uBlock Origin Recommended Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory. Rated 4.8 out of 5 Raymond Hill 5,572,178 users * Adblock Plus Adblock Plus 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). Rated 4.5 out of 5 Adblock Plus 5,553,582 users * Easy Screenshot Easy Screenshot Capture a screenshot of the whole webpage, and save in your desktop in default. Rated 4 out of 5 Mozilla Online 3,729,609 users * Video DownloadHelper Video DownloadHelper Recommended The easy way to download and convert Web videos from hundreds of YouTube-like sites. Rated 4.3 out of 5 mig 2,059,598 users * Cisco Webex Extension Cisco Webex Extension Join Webex meetings using Firefox (tm) Rated 2.9 out of 5 Cisco WebEx 1,961,284 users * AdBlocker Ultimate AdBlocker Ultimate Recommended Completely remove ALL ads. No "acceptable" ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware. Rated 4.8 out of 5 AdAvoid 1,718,217 users * DuckDuckGo Privacy Essentials DuckDuckGo Privacy Essentials Recommended Privacy, simplified. Our add-on provides the privacy essentials you need to seamlessly take control of your personal information, no matter where the internet takes you: tracker blocking, smarter encryption, DuckDuckGo private search, and more. Rated 4.5 out of 5 DuckDuckGo 1,577,422 users * Facebook Container Facebook Container By Firefox 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. Rated 4.5 out of 5 Mozilla Firefox 1,426,837 users * Ghostery - Privacy Ad Blocker Ghostery - Privacy Ad Blocker Recommended Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites. Rated 4.3 out of 5 Ghostery 1,173,015 users * AdBlock for Firefox AdBlock for Firefox 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. Rated 4.3 out of 5 AdBlock 1,040,950 users * Privacy Badger Privacy Badger Recommended Automatically learns to block invisible trackers. Rated 4.8 out of 5 EFF Technologists 1,036,853 users * Honey Honey Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK. Rated 4.6 out of 5 Honey 1,032,784 users * Grammarly for Firefox Grammarly for Firefox Grammarly's writing assistant has you covered in any writing situation. With real-time suggestions to help with grammar, clarity, tone, and more, you can be confident that your writing will make the impression you want. Rated 4.1 out of 5 Grammarly 1,029,083 users * To Google Translate To Google Translate Recommended Right-click a section of text and click the Translate icon next to it to text translate or listen to it in your language. Rated 4.1 out of 5 Juan Escobar 858,686 users * Norton Safe Web Norton Safe Web Protects your browser from online threats. Rated 3.9 out of 5 NortonLifeLock 828,964 users * Dark Reader Dark Reader Recommended Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing. Rated 4.6 out of 5 Alexander Shutau 782,814 users * LastPass Password Manager LastPass Password Manager Recommended LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device. Rated 3.7 out of 5 LastPass 773,184 users * Vizual'nye zakladki ot Iandeks Vizual'nye zakladki ot Iandeks Vizual'nye zakladki - eto stranitsa, na kotoroi sobrany vashi liubimye saity. Rated 3.7 out of 5 Yandex 765,592 users * AdGuard AdBlocker AdGuard AdBlocker Recommended Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites. Rated 4.7 out of 5 Adguard Software Ltd 752,497 users * IDM Integration Module IDM Integration Module Download files with Internet Download Manager Rated 4.6 out of 5 Internet Download Manager, Tonec Inc. 727,890 users * HTTPS Everywhere HTTPS Everywhere Recommended Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix. Rated 4.7 out of 5 EFF Technologists 715,671 users * Enhancer for YouTube(tm) Enhancer for YouTube(tm) Recommended Take control of YouTube and boost your user experience! Rated 4.7 out of 5 Maxime RF 708,355 users * MetaMask MetaMask Ethereum Browser Extension Rated 4.3 out of 5 danfinlay 669,612 users * Easy Youtube Video Downloader Express Easy Youtube Video Downloader Express Recommended A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats. Rated 4.2 out of 5 Dishita 632,378 users * Kaspersky Protection 2021 Kaspersky Protection 2021 Your protection on the Internet with extension from Kaspersky Lab Rated 4.6 out of 5 Kaspersky 628,156 users Previous1234567Next Page 1 of 1064 Go to Mozilla's homepage Add-ons * About * Firefox Add-ons Blog * Extension Workshop * Developer Hub * Developer Policies * Community Blog * Forum * Report a bug * Review Guide Browsers * Desktop * Mobile * Reality * Enterprise Products * Browsers * VPN * Relay * Monitor * Pocket * Twitter (@firefox) * Instagram (Firefox) * YouTube (firefoxchannel) * Privacy * Cookies * Legal Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version. Change language[English (US) ]