WCAG Contrast checker
Checks for compliance with the contrast levels of foreground and background colors combination based on the requirements of WCAG 2.2
3,955 users
Fontanello
A browser extension that lets you display the basic typographic styles of a text by right-clicking it.
3,939 users
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
3,924 users
Carbonalyser
Allows to visualize the electricity consumption and greenhouse gases (GHG) emissions that your Internet browsing leads to.
3,854 users
HTTP Version Indicator
An indicator showing the HTTP version used to load the page in the address bar.
3,794 users
cliget
Download login-protected files from the command line using curl, wget or aria2.
3,785 users
FirePHP
Log from PHP to a devtools panel.
3,730 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.
3,683 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
3,645 users
ICPBravoAccess
ICPBravo Access ICPBrasil and General PKI Extension.
3,641 users
retire.js
Scanning website for vulnerable js libraries.
3,598 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.
3,558 users
CookieManager - Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
3,543 users
Try XPath
This add-on displays the result of evaluating XPath expression or CSS selector.
3,531 users
Copilot (GPT-4) in Google
🗨️ Microsoft Copilot answer alongside Google results.
3,453 users
Postman Interceptor
Capture requests from any website within Firefox and send them to Postman App
3,450 users
Simple WebSocket Client
Construct custom Web Socket requests and handle responses to directly test your Web Socket services.
3,448 users
ffCK Overlays
Right-click any element to remove it. Inspired by the Chrome extension "F*ck Overlays".
3,444 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/ !!!
3,426 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.
3,408 users
Omnibug
The leading browser extension for analytics and marketing technology testing and debugging
3,350 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.
3,335 users
4ebur.net
4ebur.net VPN Proxy is a secure, anonymous internet connection.
3,319 users
base64 decoder
select some text, and base64 decode it.
3,307 users
Jazz-MIDI
MIDI support for browsers
3,245 users