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.
14,331 users
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
12,898 users
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.
12,478 users
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)
12,477 users
Lightning Autofill
The most popular autofill extension, boosting productivity since 2010.
12,021 users
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)
11,870 users
Flag Cookies
A cookie and browser storage data manager on steroids to mark, 'flag', and manage cookies using rulesets.
11,570 users
Header Editor
Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests
10,707 users
Mobile emulator
Smartphone emulator on computer very realistic with several models to test mobile websites.
10,546 users
axe DevTools® - Web Accessibility Testing
Add accessibility auditing to the Firefox Developer Tools
10,462 users
Proxy Toggle
Toggle between direct connection and a single proxy server via a toolbar icon.
10,084 users
IP Address and Domain Information
The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.
10,055 users
