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Firefox extension

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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AutomaApp /automa

A browser extension for automating your browser by connecting blocks

javascript chrome-extension workflow automation vue firefox-extension browser-extension hacktoberfest browser-automation

UpdatedFeb 10, 2026
Vue

cat-catch

xifangczy /cat-catch

猫抓浏览器资源嗅探扩展 / cat-catch Browser Resource Sniffing Extension

javascript chrome-extension jquery firefox chrome video-downloader firefox-extension m3u8-downloader

UpdatedFeb 5, 2026
JavaScript

Anarios /return-youtube-dislike

Chrome extension to return youtube dislikes

chrome-extension firefox youtube firefox-addon firefox-extension dislike dislikes dislikes-count dislike-button

UpdatedDec 12, 2025
JavaScript

ext-saladict

crimx /ext-saladict

🥗 All-in-one professional pop-up dictionary and page translator which supports multiple search modes, page translations, new word notebook and PDF selection searching.

react chrome-extension firefox chrome typescript rxjs extension dictionaries firefox-addon webextension firefox-extension saladict

UpdatedOct 8, 2025
TypeScript

ajayyy /SponsorBlock

Skip YouTube video sponsors (browser extension)

chrome-extension firefox chrome youtube opera chromium firefox-extension adblock web-extension youtube-videos adblocker hacktoberfest sponsored-segments sponsorblock

UpdatedFeb 17, 2026
TypeScript

ChatGPTBox-dev /chatGPTBox

Integrating ChatGPT into your browser deeply, everything you need is here

chrome-extension safari-extension firefox-addon firefox-extension browser-extension edge-extension chatgpt

UpdatedFeb 19, 2026
JavaScript

buster

dessant /buster

Captcha solver extension for humans, available for Chrome, Edge and Firefox

chrome-extension recaptcha captcha firefox-extension browser-extension captcha-solving captcha-solver

UpdatedJun 4, 2024
JavaScript

simpread

Kenshin /simpread

简悦 ( SimpRead ) - 让你瞬间进入沉浸式阅读的扩展

react chrome-extension firefox chrome firefox-addon firefox-extension reader readability reading-list crx

UpdatedSep 16, 2025
JavaScript

omni

alyssaxuu /omni

The all-in-one tool to supercharge your productivity ⌨️

javascript chrome-extension productivity firefox chrome interface firefox-addon spotlight bookmark history commands bookmarks raycast firefox-extension dark shortcuts bookmarks-manager tabs-management omnisearch

UpdatedJan 11, 2024
JavaScript

floccus

floccusaddon /floccus

☁️ Sync your bookmarks privately across browsers and devices

chrome-extension firefox sync chrome firefox-addon bookmark nextcloud owncloud webdav bookmarks webextension firefox-extension browser-bookmarks edge-extension syncing-bookmarks nextcloud-bookmarks sync-solution

UpdatedFeb 18, 2026
JavaScript

chatgpt-advanced

interstellard /chatgpt-advanced

WebChatGPT: A browser extension that augments your ChatGPT prompts with web results.

chrome-extension ai firefox-addon firefox-extension browser-extension chatgpt

UpdatedAug 13, 2024
TypeScript

iorate /ublacklist

Blocks specific sites from appearing in Google search results

chrome-extension firefox-extension blocker google-search

UpdatedFeb 8, 2026
TypeScript

openstyles /stylus

Stylus - Userstyles Manager

chrome-extension privacy opera-addon stylish firefox-extension userstyles usercss

UpdatedJan 29, 2026
JavaScript

requestly /requestly

Free and open-source API Client & Interceptor.

chrome-extension api open-source mock-server api-client firefox-extension postman api-rest bruno api-testing hacktoberfest api-mock postman-collection fiddler http-interceptor insomnia charles-proxy postman-api postman-environment bruno-alternative

UpdatedFeb 20, 2026
TypeScript

QOwnNotes

pbek /QOwnNotes

QOwnNotes is a plain-text file notepad and todo-list manager with Markdown support and Nextcloud / ownCloud integration.

chrome-extension markdown c-plus-plus qt dropbox notebook notes bookmark nextcloud owncloud caldav firefox-extension pim note-taking pkm nextcloud-notes qownnotes local-first second-brain llm

UpdatedFeb 20, 2026
C++

notion-enhancer

notion-enhancer /notion-enhancer

An enhancer/customiser for the all-in-one productivity workspace Notion

chrome-extension windows macos linux productivity firefox integrations chrome hack extensions mod themes edge firefox-extension mods enhancer notion edge-extension mod-loader notion-enhancer

UpdatedFeb 19, 2026
JavaScript

honestbleeps /Reddit-Enhancement-Suite

Reddit Enhancement Suite

chrome-extension reddit firefox-addon firefox-extension hacktoberfest edge-extension

UpdatedFeb 12, 2025
JavaScript

OhMyGuus /I-Still-Dont-Care-About-Cookies

Debloated fork of the extension "I don't care about cookies"

chrome-extension firefox firefox-addon firefox-extension browser-extension

UpdatedFeb 20, 2026
JavaScript

RetireJS /retire.js

scanner detecting the use of JavaScript libraries with known vulnerabilities. Can also generate an SBOM of the libraries it finds.

javascript chrome-extension security scanner grunt-plugins firefox-extension build-tool vulnerabilities software-composition-analysis vulnerable-libraries insecure-libraries sbom sbom-generator sbom-tool

UpdatedFeb 14, 2026
JavaScript

ansh /jiffyreader-public-archive

A Browser Extension for faster reading on ANY website!

chrome-extension safari-extension bookmark reading firefox-extension reader opera-extension browser-extension web-extension brave-extension read-faster

UpdatedJul 16, 2025
TypeScript

Created by Mozilla

Released April 4, 2006

Followers: 334 followers
Website: github.com/topics/firefox-extension
Wikipedia: Wikipedia

Related topics

browser firefox mozilla webextension

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