- Open in PDF-XChange™ Viewer- Adds a context menu item to send PDF links directly to PDF-XChange™ Viewer - 369 users
- KeePass Helper - URL in title- Puts a hostname or a URL in the window title. It does not modify the title of a tab, just the window title. It does not inject any JavaScript code to a website, so it can't corrupt, nor can it be corrupted by it. - 366 users
- SelectON — selection popup. Copy & search- Customizable popup with actions on text selection, just like in Opera browser - 365 users
- Grayscale- Turn all tabs into black-white color. Click the icon again to turn back to original color. - 364 users
- AutoRefresh- Extensão desenvolvida para recarregar a página selecionada de acordo com os tempos disponíveis nela. - 363 users
- Anori- Customizable new tab: compose your own page from widgets - 363 users
- Qwant.app Search- Ajoute Qwant.app comme moteur de recherche - 363 users
- Sound Control- Manage audible web pages from a central location. - 362 users
- ZButton+: Undo Close Tab- Adds Undo Close Tab Button - 361 users
- Open in Brave Browser- Open current page, link, or all tabs in the Brave browser - 361 users
- Most Recent Tab - Keyboard shortcut for last tab- Adds a keyboard shortcut (default: control-shift-1 / cmd-shift-1) and toolbar button to quickly go back to the previously selected tab. Useful to alternate between two tabs and to easy go back to your last tab if you switch to another briefly. - 361 users
- MaxFocus: Link Preview- Preview websites without leaving current tab. Keep your browsing focused! - 360 users
- Hide tabs- This extension enables you to quickly hide and restore tabs. - 358 users
- Alt+Number to switch tabs- This extension adds keyboard shortcuts to switch tabs. Alt+1 switches to the first tab, Alt+2 switches to the second tab, and so on. Alt+9 switches to the last tab. This matches the shortcuts on Linux. - 351 users
- HTML Universal Speed Control- Control the speed of HTML websites with various timing methods. - 350 users
- Save to Bookmark OS- Save bookmarks easily to the Bookmark OS website (https://bookmarkos.com). - 349 users
- [STG plugin] Open Manage groups- Open Manage groups page in Simple Tab Groups extention - 349 users
- Merge All Windows- Click to merge all currently opened windows into single one - 347 users
- Clock- Date & time - 345 users
- Multi URL Opener- Open multiple URLs at the same time in one click! Do you check every day a few specific sites? And you're getting tired of opening them one-by-one? Start being lazy by using this add-on! - 343 users
- Manga Downloader Assistant- An extension to get necessary data to bypass Cloudflare and similar anti-bot protection for Manga Downloader desktop application - 343 users
- Select like a Boss - Select all kinds of text by d- With this extension, you can easily select link text just like regular text, making it easier to copy. Just Select like a Boss! ;) - 340 users
- Ruto - XPath Finder- Rūto brings the best XPath to you. We are striving hard to improve better performance and more new features - 340 users
- New Tab Same Group- Opens new tabs in the same group as the active one — right after, at the beginning, or at the end. Supports Firefox’s native tab groups, vertical (sidebar) or horizontal (classic) modes. - 339 users
- Shorten me - URL Shortener- Shortens links and current tab's url using a short-url service. - 339 users














![[STG plugin] Open Manage groups](https://addons.mozilla.org/user-media/addon_icons/986/986719-64.png?modified=1856603d)







