uBlocko
is a general-purpose blocker.
Source
CanvasBlocker
blocks canvas-API to prevent canvas fingerprinting.
Source
Skip Redirect
removes tracking elements from URLs.
Source
Default Zoom
sets default zoom level.
Source
Feedbro
is advanced feed reader (RSS, Atom, RDF) with built-in social media plugin support (Youtube, Facebook, Twitter, Instagram and etc.).
Print Edit WE
helps to choose the contents of a web page prior to printing.
Translate Web Pages
translates whole page using Google or Yandex or selected text using Google, Yandex, Bing or DeepL.
Source
Bookmark Dupes
displays/removes duplicate bookmarks.
Source
Selective Bookmarks Export Tool
exports selected bookmarks.
Source
Bookmarks Commander
a two-panel bookmarks manager.
Source
Bookmark search plus 2
displays and filters bookmarks on search string, show parent folders.
Source
HTML Validator
adds HTML validation to Firefox Developer Tools.
Markdown Viewer Webext
is Markdown (.md) file viewer.
Source,
Note for Linux users
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)
Searchfox is a source code indexing tool for Mozilla Firefox
Nightly Firefox source code search tool
Firefox Builds - mozillaZine Forums
Keyboard shortcuts - Firefox Help
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
• Chromium