Firefox

Extensions

Security/Privacy

GitHub uBlocko is a general-purpose blocker. GitHub Source

GitHub CanvasBlocker blocks canvas-API to prevent canvas fingerprinting. GitHub Source

AMO Skip Redirect removes tracking elements from URLs. GitHub Source

Misc

AMO Default Zoom sets default zoom level. GitHub Source

AMO Feedbro is advanced feed reader (RSS, Atom, RDF) with built-in social media plugin support (Youtube, Facebook, Twitter, Instagram and etc.).

AMO Print Edit WE helps to choose the contents of a web page prior to printing.

AMO Translate Web Pages translates whole page using Google or Yandex or selected text using Google, Yandex, Bing or DeepL. GitHub Source

Bookmarks

AMO Bookmark Dupes displays/removes duplicate bookmarks. GitHub Source

AMO Selective Bookmarks Export Tool exports selected bookmarks. GitHub Source

AMO Bookmarks Commander a two-panel bookmarks manager. GitHub Source

AMO Bookmark search plus 2 displays and filters bookmarks on search string, show parent folders. GitHub Source

Development

AMO HTML Validator adds HTML validation to Firefox Developer Tools.

AMO Markdown Viewer Webext is Markdown (.md) file viewer. GitHub Source, Note for Linux users

Info

Extensions - arkenfox Wiki

Configuration

user.js file in your Profile directory.

Comprehensive user.js template for configuring and hardening Firefox - arkenfox

Notes on Firefox settings - DonQuixoteI

Privacy-Handbuch - privacy-handbuch.de (in German)

Firefox Tuning zur Absicherung und Anonymisierung - kairaven.de (in German)

Bugzilla/Release/Source

Bugzilla

Firefox Releases for Desktop

Release Calendar

Searchfox is a source code indexing tool for Mozilla Firefox

Nightly Firefox source code search tool

Forums

mozillaZine Forums

Firefox Builds - mozillaZine Forums

Help

Keyboard shortcuts - Firefox Help

Set Default Browser (Linux)

LibreWolf - A custom version of Firefox, focused on privacy, security and freedom

For making LibreWolf your default web browser:

# update-alternatives --install /usr/bin/x-www-browser x-www-browser /opt/librewolf/librewolf 80
# update-alternatives --config x-www-browser

Debian - How to add browser to update-alternatives? - Unix & Linux Stack Exchange

Alternatives

Chromium