To use Android extensions, you'll need Firefox for Android. To explore Firefox for desktop add-ons, please visit our desktop site.
Find and close duplicate browser tabs — same URL open in multiple tabs
Quick access to recently closed tabs — up to 50 entries
Automatically clicks the login button every 5 seconds.
Browse and restore recently closed tabs with title search
Detect music BPM by tapping on screen or spacebar key
Quick spell-check tool for clipboard and typed text
Apply a custom cursor overlay to any webpage you visit
Track live mouse XY coordinates and element info on page
Enhanced page search with color highlights and search history
Display one word at a time at any words-per-minute speed
Map every element's z-index on the current page and visualize the stacking order
Duplicate current tab or open all tabs in new window
Open a random Wikipedia article in your language
Scan and check all links on the current page for errors
Change the mouse pointer appearance on any website
Detect cloned tabs — list all duplicate URLs and close extras with one click
Turn any tab URL into a scannable QR code with one click
Quickly insert emojis into text fields from popup.
Translate selected text using Google Translate API
Draw freehand notes on a persistent popup whiteboard
Drag to measure any area on screen in pixels
Block distracting websites during scheduled time windows
Log daily expenses by category and track your spending
Advanced text statistics with density and keyword count
Generate a QR code for any URL or text instantly
