JavaScript Firefox

Open-source JavaScript projects categorized as Firefox

Top 23 JavaScript Firefox Projects

  • GitHub repo uBlock

    uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.

    Project mention: TIP: If you often get annoyed by sites asking to send "notifications" on Chrome browser, you can disable it completely here: chrome://settings/content/notifications | | 2021-05-12

    And in case some of you didn't know: uBlock Origin works best in Firefox

  • GitHub repo octotree

    GitHub on steroids

    Project mention: Chrome extensions I use to enhance my GITHUB experience | | 2021-04-28

    ⭐ Github Repo | Chrome Extension

  • GitHub repo bypass-paywalls-chrome

    Bypass Paywalls web browser extension for Chrome and Firefox.

    Project mention: Bill Hwang of Archegos Capital lost $20B in two days | | 2021-05-12
  • GitHub repo uBlock

    uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox, and Safari. (by uBlock-LLC)

    Project mention: Feasibility of a network-level browser based adblocking proxy? | | 2021-04-25
  • GitHub repo metamask-extension

    :globe_with_meridians: :electric_plug: The MetaMask browser extension enables browsing Ethereum blockchain enabled websites

    Project mention: Metamask experiencing issues related to sidechains/L2 layers | | 2021-05-12
  • GitHub repo Surfingkeys

    Map your keys for web surfing, expand your browser with javascript and keyboard.

    Project mention: Nyxt Browser | | 2021-03-18

    If you want a Chrome/Firefox extension that does some of these things and more, check out Surfingkeys:

  • GitHub repo melonJS

    a fresh & lightweight javascript game engine

    Project mention: CSS Deep | | 2021-02-26

    melonjs/melonJS - a fresh & lightweight javascript game engine

  • GitHub repo SingleFile

    Web Extension for Firefox/Chrome/MS Edge and CLI tool to save a faithful copy of an entire web page in a single HTML file

    Project mention: Need help downloading a Gofundme page before it gets deleted! | | 2021-05-12

    You could save the page with SingleFile.

  • GitHub repo user.js

    Firefox privacy, security and anti-fingerprinting: a comprehensive user.js template for configuration and hardening

    Project mention: Why not to run other browsers through Tor network? | | 2021-05-11

    Why Arkenfox (and also LibreWolf browser) doesn't recommend to run other browsers (than Tor) through the Tor network? It's something wrong with this?

  • GitHub repo slimerjs

    A scriptable browser like PhantomJS, based on Firefox

  • GitHub repo treestyletab

    Tree Style Tab, Show tabs like a tree.

    Project mention: Can I add #historyUndoMenu to the tab context menu? | | 2021-04-25

    I went ahead and asked the TST dev. This is what he said:

  • GitHub repo user.js

    user.js -- Firefox configuration hardening (by pyllyukko)

    Project mention: Firejail that shit! | | 2021-04-27

    (Hardened) user.js

  • GitHub repo floccus

    :cloud: Sync your bookmarks across browsers via Nextcloud, WebDAV or Google Drive

    Project mention: Is it possible to bring this browser to Mobile in the future? | | 2021-05-05

    Oh, it can? It's readme doesn't seem to point that out anywhere...

  • GitHub repo multi-account-containers

    Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.

    Project mention: Blocking trackers in Firefox, is uBlock Origin enough? | | 2021-04-19

    See this explanation.

  • GitHub repo Librefox

    Librefox: Firefox with privacy enhancements

    Project mention: https everywhere....something happen? | | 2021-04-10

    They clearly mention the reasons in a Gitlab issue.

  • GitHub repo ShadowFox

    A universal dark theme for Firefox

    Project mention: The biggest stoner on Twitch wins Mizkif's schooled show | | 2021-05-11
  • GitHub repo ClearURLs-Addon

    ClearURLs is an add-on based on the new WebExtensions technology and will automatically remove tracking elements from URLs to help protect your privacy.

    Project mention: Send: A Fork of Mozilla's Firefox Send | | 2021-05-05

    The README on the repo itself links to gitlab, including the "create an issue" link:

  • GitHub repo AdguardBrowserExtension

    AdGuard browser extension

    Project mention: ClearURLs – automatically remove tracking elements from URLs | | 2021-05-05
  • GitHub repo SingleFileZ

    Web Extension for Firefox/Chrome/MS Edge and CLI tool to save a faithful copy of an entire web page in a self-extracting HTML/ZIP polyglot file

    Project mention: How to archive an online article? | | 2021-02-13

    I'm not using them. Instead, I do have installed SingleFileZ in all my browsers. This addon actually archives your whole browsing activity including the web content to your local drive. By cleverly naming the files (starting with an ISO timestamp), those files then get indexed by the filename Memacs module.

  • GitHub repo toggl-button

    Toggl Button extension for Chrome and Firefox

    Project mention: CSS Deep | | 2021-02-26

    toggl/toggl-button - Toggl Button Chrome extension

  • GitHub repo duckduckgo-privacy-extension

    DuckDuckGo Privacy Essentials browser extension for Firefox, Chrome.

    Project mention: DuckDuckGo Privacy Extension broke my banking app. Had to turn it off. Recent bug? | | 2021-04-17

    Since the DDG Privacy Essentials extension is open source, you can go here: for release dates and details

  • GitHub repo CanvasBlocker

    A Firefox extension to protect from being fingerprinted.

    Project mention: Firefox announces Total Cookie Protection | | 2021-02-23

    There is and it's called CanvasBlocker:

  • GitHub repo nightTab

    A neutral new tab page accented with a chosen colour. Customise the layout, style, background and bookmarks in nightTab.

    Project mention: Replacement New Tab Page Suggestions | | 2021-01-24

    I use nightTab

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2021-05-12.


What are some of the best open-source Firefox projects in JavaScript? This list will help you:

Project Stars
1 uBlock 24,842
2 octotree 21,270
3 bypass-paywalls-chrome 15,086
4 uBlock 8,024
5 metamask-extension 4,767
6 Surfingkeys 3,471
7 melonJS 3,364
8 SingleFile 3,233
9 user.js 3,072
10 slimerjs 2,971
11 treestyletab 2,219
12 user.js 2,210
13 floccus 2,203
14 multi-account-containers 1,671
15 Librefox 1,540
16 ShadowFox 1,315
17 ClearURLs-Addon 1,128
18 AdguardBrowserExtension 1,070
19 SingleFileZ 911
20 toggl-button 907
21 duckduckgo-privacy-extension 721
22 CanvasBlocker 643
23 nightTab 627