Google Lighthouse
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
15 951 brukarar
SeoQuake SEO extension
Accelerate your SEO efforts on the fly. SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.
15 805 brukarar
My IP Hider VPN
My IP Hider VPN is number one tool for hiding your IP and unblocking any web site! If your Firefox version is less then 55 please install older My IP Hider VPN from "Version History" (https://goo.gl/7ZQQjZ)
14 554 brukarar
Lightning Autofill
The most popular autofill extension, boosting productivity since 2010.
13 935 brukarar
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
13 449 brukarar
javascript
add javascript that will run on this domain. back up your scripts in the options area (shortcut there by clicking the "JS" letters in the bottom right)
12 825 brukarar
Fake Filler
A form filler that fills all form inputs (textboxes, textareas, radio buttons, dropdowns, etc.) with fake and randomly generated data. The purpose of this extension is to help developers and testers test forms quickly and easily.
12 600 brukarar
Flag Cookies
A cookie and browser storage data manager on steroids to mark, 'flag', and manage cookies using rulesets.
12 041 brukarar
Simulateur mobile
Simulateur de smartphone sur ordinateur très réaliste avec plusieurs modèles disponibles pour tester son site mobile.
11 939 brukarar
Modify Header Value
Add, modify or remove a header for any request on desired domains.
11 188 brukarar
Allow CORS: Access-Control-Allow-Origin
Easily add (Access-Control-Allow-Origin: *) rule to the response header.
11 124 brukarar
Header Editor
Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests
11 086 brukarar
IP Address and Domain Information
The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.
10 926 brukarar
Proxy Toggle
Toggle between direct connection and a single proxy server via a toolbar icon.
10 071 brukarar
axe DevTools® - Web Accessibility Testing
Add accessibility auditing to the Firefox Developer Tools
9 872 brukarar
Angular DevTools
Angular DevTools extends Firefox DevTools adding Angular specific debugging and profiling capabilities.
9 795 brukarar
