Random User-Agent (Switcher)
Automatically change the user agent after a specified period of time to a randomly selected one, thus hiding your real user agent
4,085 users
ICPBravoAccess
ICPBravo Access ICPBrasil and General PKI Extension.
4,049 users
Fontanello
A browser extension that lets you display the basic typographic styles of a text by right-clicking it.
4,041 users
Postman Interceptor
Capture requests from any website within Firefox and send them to Postman App
4,017 users
retire.js
Scanning website for vulnerable js libraries.
4,004 users
simple-modify-headers
The extension rewrite the header (request or response) based on a rules table. It 's possible to add, modify or remove header fields for a choosen url pattern. It's possible to import/export the configuration
3,977 users
IPFS Companion
Harness the power of IPFS in your browser
3,962 users
cliget
Download login-protected files from the command line using curl, wget or aria2.
3,892 users
Ahrefs SEO Toolbar: On-Page and SERP Tools
On-page SEO report, broken link checker, redirect tracer, and country changer for SERP in one add-on. If you have an active account at ahrefs.com, you will also get instant access to Page, Domain, and keyword metrics via your Ahrefs account.
3,881 users
HTTP Version Indicator
An indicator showing the HTTP version used to load the page in the address bar.
3,879 users
FirePHP
Log from PHP to a devtools panel.
3,782 users
Try XPath
This add-on displays the result of evaluating XPath expression or CSS selector.
3,731 users
Copilot (Bing Chat) in Google
🗨️ Microsoft Copilot answer alongside Google results.
3,697 users
Google Analytics Debugger
Prints useful information to the JavaScript console by enabling the debug version of the Google Analytics Javascript. P.S: this add-on is migrated from Chrome store.
3,656 users
ColorFish 🐠 Color Picker
Open-Source Color Picker for Websites and Desktop Apps. With ColorFish you can get a color reading from any point in your browser and desktop. ColorFish is the only eyedropper browser extension with desktop color selection support.
3,649 users
Simple WebSocket Client
Construct custom Web Socket requests and handle responses to directly test your Web Socket services.
3,614 users
CookieManager - Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
3,605 users
Hoppscotch Extension for Firefox
Provides better experience for using the Hoppscotch web app. Haven't used Hoppscotch ? It's an amazing quick API Request Builder. Try it at https://hoppscotch.io/ !!!
3,573 users
SVG Gobbler
Download and optimize icons, logos, and vector SVGs from websites. SVG Gobbler hunts down the SVG content in your current tab, highlights unique attributes about it and gives you the option to download or copy to clipboard.
3,514 users
Omnibug
The leading browser extension for analytics and marketing technology testing and debugging
3,483 users
SEO Analysis & Website Review by WooRank
Instant SEO analysis and website reviews for SEO, mobile, usability and social media. The freshest data when and where you want it.
3,419 users
ffCK Overlays
Right-click any element to remove it. Inspired by the Chrome extension "F*ck Overlays".
3,385 users
4ebur.net
4ebur.net VPN Proxy is a secure, anonymous internet connection.
3,342 users
Page Ruler
Measure page elements size in pixel with an easy-to-use ruler.
3,290 users
Clockwork
php dev tools integrated to your browser
3,279 users