Firefox extensions
Listed on Firefox Add-ons. They also install in Firefox-based browsers such as LibreWolf, Waterfox, Zen and Floorp.
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345 results, page 11 of 12
TunnelBear
A simple consumer VPN service with a limited free plan and apps for major platforms.
Turn Off the Lights
Dims everything around a video and adds a site-wide dark mode.
Twos
An app for quickly writing down notes, to-dos, reminders and events organised by day.
uBlacklist
A browser extension that hides sites you choose from search engine results.
uBlock Origin Lite
A Manifest V3 content blocker from the uBlock Origin project that filters ads and trackers.
Ui.Vision
An open source browser extension and desktop app for recording and running browser and desktop macros.
Unhook
A browser extension that hides YouTube recommendation feeds, comments and other distractions.
Unpaywall
A browser extension that finds legal open-access copies of paywalled research papers.
UpNote
A cross-platform notes app with rich text, Markdown support, nested notebooks and automatic sync.
urlscan.io
Sandbox for the web that loads a URL and records screenshots, requests and indicators.
User-Agent Switcher and Manager
A configurable browser extension that changes the User-Agent string the browser reports, globally or per site.
Varia
A simple download manager for regular downloads, torrents and videos, built on aria2.
VeePN
A commercial VPN service with desktop apps and browser extensions for hiding your IP address.
Video DownloadHelper
Detects and downloads videos from a very large number of sites.
Video Speed Controller
A browser extension that adds keyboard shortcuts to speed up, slow down and rewind HTML5 video.
Vimium
Vim-style keyboard shortcuts for navigating the web.
Vimium C
A keyboard navigation browser extension, derived from Vimium, with tab commands and an advanced omnibar.
Violentmonkey
Open-source userscript manager with cloud backup.
VisBug
Point-and-click editing tools for any live web page.
VPN.ac
A commercial VPN service with WireGuard, OpenVPN and obfuscated protocols and servers in many countries.
Vue DevTools
Inspector for Vue component trees, Pinia and Vuex state and routing.
W3Techs Site Info
A free web lookup that shows the CMS, programming language, web server and host a site uses.
wallabag
Self-hosted read-it-later service that keeps a clean copy of articles.
Want My RSS
A Firefox extension that restores feed detection and in-browser RSS previews removed from Firefox.
Wappalyzer
Identifies the technologies a website is built with.
WAVE
A suite of web accessibility evaluation tools, available online and as browser extensions.
Wayback Machine
The Internet Archive's browser extension for saving pages and viewing archived copies of missing ones.
Web Archives
A browser extension that looks up archived and cached copies of the page you are viewing.
Web Developer
Toolbar of web development tools for inspecting and manipulating a page.
Web Scraper
A point-and-click browser extension for extracting structured data from websites, with a paid cloud service.
