Tamper Data for FF Quantum
- Monitor live requests - Edit headers on live requests - Cancel live requests - Redirect live requests Click the blue cloud in the toolbar to start tampering. When you're done, click it again to stop.
2,433 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.
2,411 users
ffCK Overlays
Right-click any element to remove it. Inspired by the Chrome extension "F*ck Overlays".
2,380 users
Omnibug
The leading browser extension for analytics and marketing technology testing and debugging
2,366 users
Carbonalyser
Allows to visualize the electricity consumption and greenhouse gases (GHG) emissions that your Internet browsing leads to.
2,357 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.
2,301 users
Youtube Play All
Adds a 'Play All' button to YouTube, allowing video playback in Latest, Popular, or Oldest order.
2,286 users
Script Blocker Ultimate (NoScript, Disable JS)
Best Script Blocker for Firefox. (Best in Performance, This addon does NOT track user activities same as others)
2,278 users
ASBPlayer: Learn with Subs
Language learning subtitle player for streaming platforms like Netflix, YouTube, and more.
2,187 users
HTTP request maker
Displays a sidebar that lets you to forge HTTP requests. Press Alt+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.
2,167 users
PDF Combine - Convert and Merge
Convert and merge multiple files with different formats into a single PDF document
2,146 users
CookieManager - Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
2,121 users
Link Extractor
Modern Web Extension to extract, parse, and open links from any site or text with optional filters.
2,086 users
Squarespace ID Finder
Find the ids of collections, sections, and blocks on your Squarespace page. Works with both 7.0 and 7.1.
2,085 users
webhint
Check for best practices and common errors with your site's accessibility, speed, security and more.
2,083 users
