firefox-webextension

Firefox Extensions are add-ons that allow users to customize their web browser from Mozilla. They are downloadable through the Firefox Add-on website. Modern extensions follow WebExtension standard and are most often written in HTML, JavaScript, and CSS.

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gdh1995 /vimium-c

Star4.3k

A keyboard shortcut browser extension for keyboard-based navigation and tab operations with an advanced omnibar

chrome-extension keyboard-shortcut webextension edge-extension vimium firefox-webextension keyboard-assistance

UpdatedFeb 3, 2026
TypeScript

deathau /markdownload

Sponsor

Star3.7k

A Firefox and Google Chrome extension to clip websites and download them into a readable markdown file.

chrome-extension safari-extension firefox-addon firefox-extension edge-extension firefox-webextension web-clipper

UpdatedJun 11, 2025
JavaScript

Drive4ik /simple-tab-groups

Star1.4k

Create, modify and quick change tab groups. Inspired by the Tab Groups app :)

groups tabs webextension firefox-webextension simple-tab-groups tab-group

UpdatedFeb 14, 2026
JavaScript

betterbrowser /arcfox

Star1.2k

Make your production flow

firefox browser firefox-addon addon firefox-tweaks tabs webextension sidebar firefox-customization firefox-extensions firefox-webextension firefox-theme firefox-browser firefox-css arc-browser betterbrowser

UpdatedJun 1, 2025
JavaScript

josh-berry /tab-stash

Sponsor

Star991

Firefox extension to save and restore tabs as bookmarks. Clear your tabs, clear your mind.

firefox firefox-addon bookmark tabs webextensions sidebar firefox-extension bookmark-manager tabs-management firefox-webextension tab-stash

UpdatedFeb 20, 2026
TypeScript

rhardih /ekill

Star977

Chrome/Firefox extension to nuke annoying elements in a web page

chrome-extension firefox-addon firefox-webextension

UpdatedJul 16, 2019
JavaScript

FoxRefire /wvg

Sponsor

Star719

Chrome/Firefox extension for pen-testing to retrieve encryption keys of Widevine protected content !DON'T DECRYPT CONTENT UNLESS YOU HAVE THE RIGHT TO DO IT!

chrome-extension firefox-addon webassembly wasm webextension webextensions firefox-extension drm web-extension widevine chrome-extensions web-extensions firefox-extensions firefox-webextension web-ext pyodide firefox-add-ons firefox-addons encrypted-media-extensions pywidevine

UpdatedOct 29, 2024
JavaScript

Midnight-Lizard /Midnight-Lizard

Star712

Сustom color schemes for all websites

chrome-extension accessibility night-mode dark-theme color-scheme contrast readability brightness grayscale dark-mode firefox-webextension contrast-theme blue-filter red-shift high-contrast

UpdatedDec 24, 2025
TypeScript

sereneblue /chameleon

Star626

WebExtension port of Random Agent Spoofer

firefox privacy webextension browser-fingerprint firefox-webextension firefox-quantum privacy-extension

UpdatedJan 19, 2026
TypeScript

dedoussis /icloud-hide-my-email-browser-extension

Sponsor

Star456

Enjoy iCloud's Hide My Email service in your favourite browser

chrome-extension firefox chrome apple privacy firefox-addon email firefox-extension icloud chrome-extensions firefox-webextension chromium-extension

UpdatedNov 23, 2025
TypeScript

garywill /BigSearch

Star266

Browser extension. Definitly more than a GET/POST sender. Handily use search engines via a Flexible Tool! UI has Vimium-like feature 🌐🔍 (Pure-client. No 3rd-party server needed) 大术专搜既专又广手敲几下纵横去往