To use Android extensions, you'll need Firefox for Android. To explore Firefox for desktop add-ons, please visit our desktop site.
OneNav可帮助您将浏览器书签集中式管理，解决跨设备、跨平台、跨浏览器之间同步和访问困难问题，做到一处部署，随处访问。
Override any site's CSS with your own rules — saved per domain
Rapid serial visual presentation reader with WPM control
Extract and copy color palettes from any webpage
Mini calendar with note saving for any selected date
Automatically rejects cookie consent banners on websites.
Simple canvas whiteboard for quick sketching and drawing
Format numbers as currency percent scientific and more
Keep a history of closed tabs and reopen them anytime
Enhanced page search with color highlights and search history
Track live mouse XY coordinates and element info on page
Quick spell-check tool for clipboard and typed text
Display one word at a time at any words-per-minute speed
Measure words per minute with random text challenges
Overlay ruler tool to check sizes and spacing on page
Open a random Wikipedia article in your language
Find text on any page with colorful highlights and match navigation
Rename any browser tab's title and save the name for that URL
Decode and inspect JWT tokens with header payload and exp
Fast markdown notepad with formatting and storage
High-precision stopwatch with lap history and export
Edit the title of any tab and pin custom names to specific URLs
Real-time cursor position tracker with viewport metrics
Test your typing speed in WPM with live accuracy meter
