Mozilla Firefox Plugins, Add-ons and extension Page 3 of 80

Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.

Efficient reverse image search engine that identifies exact usages and altered images online, provides source information, and ensures ad-free, lightweight experience.

Block ads, cookies, popups & other trackers. Ghostery sets you up for a private, transparent, and fast internet.

End-to-end encrypted platform with zero-knowledge security for notes, tasks, files, diary entries, and password management. Browser accessible.

Instantly translate content across 244 languages using powerful AI models. Drag the Kagi Translate bookmarklet for effortless one-click web page translations.

Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.

Lets you sync your data and preferences (such as your bookmarks, history, passwords, open tabs and installed add-ons) across all your devices. It's free to use.

Save web content to your vault with offline access. Secure and private, it clips anything from articles to recipes and integrates seamlessly into Obsidian.

A fully self-hostable, open-source collaborative bookmark manager to collect, organize and archive webpages.

Extension for Chrome and Firefox downloading both audio and video from many websites. Detects downloadable content and offers a user-friendly menu.

Violentmonkey provides userscript support for Chrome, Opera, Maxthon and Firefox supporting most scripts for Greasemonkey and Tampermonkey.

Cross-platform tool for collecting, searching, and organizing images, videos, audio, and fonts with advanced tags, smart folders, and color filters for creative asset management.

Offers real-time grammar checks, generative AI drafting, and comprehensive feedback on clarity, tone, and style for confident and polished writing.

Save web links and email newsletters, add notes and highlights, tag and favorite articles, and read distraction-free in a Markdown viewer online or offline.

Save web pages for offline reading, organize long articles and blog posts, enjoy distraction-free mode, and sync content across devices with text-to-speech support.

2FAS Authenticator is a simple and free application for Two Factor Authentication (2FA Authentication) which generates Time-based One-time Passwords (TOTP) and PUSH authentication*.

Redesign the web with Stylus, a user styles manager.

A web extension that redirects YouTube, Twitter, Instagram... requests to alternative privacy friendly frontends and backends.

NeverWrite is a local-first knowledge workspace for people who need to handle workflows with multiple parallel agents and subagents. Built like a code editor, but for markdown. It has inline review changes, like Cursor and others.

Manages bookmarks and RSS feeds with customizable widgets and themes. Offers browser extensions for cross-device usability and personalized pages.

IPFS is a global, versioned, peer-to-peer filesystem. It combines ideas from Git, BitTorrent, Kademlia, SFS, and the web. It is like a single bittorrent swarm, exchanging git objects. IPFS provides an interface as simple as the HTTP web, but with permanence built in.

Snowflake is a system to defeat internet censorship. People who are censored can use Snowflake to access the internet. Their connection goes through Snowflake proxies, which are run by volunteers.

HTTPS Everywhere is a browser extension produced as a collaboration between The Tor Project and the Electronic Frontier Foundation. It encrypts your communications with a number of major websites.

Control D is a modern and customizable DNS service that blocks threats, unwanted content and ads - on all devices. Onboard in minutes, and forget about it.

Save, annotate, and organize web resources with highlighters, sticky notes, cross-device sync, Outliner, advanced search, and flexible sharing options.