- Angular DevTools- Angular DevTools extends Firefox DevTools adding Angular specific debugging and profiling capabilities. - 9 203 användare
- axe DevTools® - Web Accessibility Testing- Add accessibility auditing to the Firefox Developer Tools - 8 904 användare
- Refined GitHub- Simplifies the GitHub interface and adds many useful features. - 8 661 användare
- SQLite Manager- manage, edit, manipulate, plot and save one or multiple SQLite databases simultaneously - 8 080 användare
- EditThisCookie2- EditThisCookie är en cookie hanterare. Du kan lägga till, ta bort, ändra, söka, skydda och blocka cookies! - 8 063 användare
- Ignore X-Frame-Options Header- Allows all sites to be loaded in iframes, despite X-Frame-Options header settings. - 8 054 användare
- OCR - Image Reader- A powerful optical character recognition (OCR) extension to capture and convert images to text - 7 822 användare
- HTTP Header Live- Displays the HTTP header. Edit it and send it. - 7 771 användare
- Emoji Cheatsheet- A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook. Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard. - 7 544 användare
- BuiltWith- BuiltWith is a web site profiler tool. Upon looking up a page, BuiltWith returns a list all the technologies in use on that page that it can find. - 7 388 användare
- Odoo Debug- Toggle debug mode of an Odoo webpage. - Click for debug. - Double click for debug with Assets. - Use ctrl + . for keyboard shortcut Source code: https://github.com/pga-odoo/OdooDebug Emoji art supplied by Emojione - 7 377 användare
- signTextJS plus- window.crypto.signText replacement plus enhancements - 7 320 användare
- WebScrapBook- Capture web pages to local device or backend server for future retrieval, organization, annotation, and edit. - 7 148 användare
- HackBar V2- [No License, FOREVER FREE] A HackBar for new firefox (Firefox Quantum). This addon is written in webextension and alternatives to the XUL version of original Hackbar. You can ask request here: https://github.com/Hack-Free/HackBar - 7 053 användare
- Emoji Keyboard - Emojis For Firefox- A free extension of the web tool https://coolsymbol.com/emojis/emoji-for-copy-and-paste.html. It helps input emoji in the web browser with an extensive search functionality. - 6 922 användare
- Form History Control- Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller. Auto-save text entered in any form while typing to allow fast recovery when disaster strikes. - 6 920 användare
- polkadot{.js} extension- Manage your Polkadot accounts outside of dapps. Injects the accounts and allows signs transactions for a specific account. - 6 894 användare
- Html Validator- HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon For Firefox 56, use 0.974 (see all versions below). For Firefox 57, see Web Extensions. - 6 758 användare
- Page Saver WE screenshot capture tool- Quickly and easily capture an image of a web page. Options allow you to control output format (PNG or JPEG), file name and more. - 6 727 användare
- IPvFoo- Display the server IP address, with a realtime summary of IPv4, IPv6, and HTTPS information across all page elements. - 6 528 användare
- CORS Unblock- No more CORS error by appending 'Access-Control-Allow-Origin: *' header to local and remote web requests when enabled - 6 441 användare
- Cookie Remover- Removes cookies for the current site - 6 434 användare
- Postman Interceptor- Capture requests from any website within Firefox and send them to Postman App - 6 420 användare
- Purple Ads Blocker for Twitch- Purple AdBlock is a adblock for Twitch.tv - 6 398 användare
- All Downloader Professional- All Downloader Professional finds links, images, videos, documents on a website an make them downloadable. - 6 326 användare
























