Color Picker For Firefox
HEX Color Picker, RGB Color Picker, Color Picker EyeDropper, Pick color from web page (Color Picker For Firefox)
2,892 users
HTTP request maker
Displays a sidebar that lets you to forge HTTP requests. Press Ctrl+Shift+Y to show the sidebar and make your own HTTP request. You can choose the method GET, HEAD, POST, OPTIONS, PUT DELETE and the body data to send. Response in the main window.
2,851 users
ffCK Overlays
Right-click any element to remove it. Inspired by the Chrome extension "F*ck Overlays".
2,846 users
CookieManager - Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
2,829 users
Omnibug
The leading browser extension for analytics and marketing technology testing and debugging
2,796 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.
2,782 users
Basic JSON Formatter
Adds a page action to pretty-print JSON. Unlike similar extensions, this simply pretty-prints it. It doesn't add any kind of viewer, colors, or collapsing. If you want this to work as expected, disable devtools.jsonview.enabled in about:config.
2,746 users
Carbonalyser
Allows to visualize the electricity consumption and greenhouse gases (GHG) emissions that your Internet browsing leads to.
2,723 users
HackTools
Hacktools, is a web extension facilitating your web application penetration tests, it includes cheat sheets as well as all the tools used during a test such as XSS payloads, Reverse shells to test your web application.
2,625 users
Merge Windows
Merges the tabs from multiple windows together into one window. Extension won't show context menu item when there aren't more than one window of the same type to merge together. Private windows will only merge with private windows not normal.
2,546 users
Vue.js Devtools v6 (legacy)
Browser DevTools extension for debugging Vue.js applications. This is the legacy version of Vue Devtools (v6) for Vue 2 compatibility.
2,526 users
Salesforce Inspector Reloaded
Productivity tools for Salesforce administrators and developers to inspect data and metadata directly from the Salesforce UI.
2,511 users
webhint
Check for best practices and common errors with your site's accessibility, speed, security and more.
2,506 users
View Image Info Reborn
Display info for the current image in a new window, new tab, or overlaid on the image. Convert WEBP images to PNG or JPEG. Send an image URL to TinEye for reverse image search. "View image..." in same tab? Check the screenshots for all the options.
2,462 users
