Top 23 JavaScript Extension Projects

Extensions

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1. numi

   1 53 6,511 0.0 JavaScript

   Beautiful calculator app for macOS, Linux & Windows

   

   Project mention: 7 Underrated Mac Apps Every Developer Should Try in 2026 | dev.to | 2026-03-25

   Numi is a text-based calculator that lets you type things like "25% of $400" or "3 hours 20 minutes in seconds" and just get the answer. It handles unit conversions, currency, time zones, and variables. Think of it as a scratchpad that does math.

2. AppSignal

   www.appsignal.com sponsored

   Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.

   

3. notion-enhancer

   2 57 5,027 8.3 JavaScript

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

   

4. CEP-Resources

   3 6 1,841 3.9 JavaScript

   Tools and documentation for building Creative Cloud app extensions with CEP

   

5. ca-archive

   4 45 528 0.0 JavaScript

   Catalog of classic Firefox add-ons created before WebExtensions apocalypse

   

6. edge-developer

   5 2 450 9.2 JavaScript

   Developer documentation for Edge.

   

7. youtube-ambilight

   6 1 356 8.6 JavaScript

   This browser extension adds ambient light to YouTube videos

   

8. vertical-overview

   7 21 314 0.0 JavaScript

   Gnome has had vertically stacked workspaces for a long time. The Gnome 40 update unfortunately made the switch to a horizontal layout. A choice that many Gnome users disagree with. This extension completely replaces the new Gnome overview with something that resembles the old style.

   

9. SaaSHub

   www.saashub.com sponsored

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

10. link_cleaner

    8 2 87 2.0 JavaScript

    A Firefox extension to clean urls from tracking and advertisement parameters

    

11. PreviewMarkdown

    9 1 64 8.0 JavaScript

    QuickLook Markdown preview and icon thumbnailing app extensions for macOS Catalina and beyond

    

12. scriptlet-doctor

    10 1 58 2.6 JavaScript

    Allow inline scripts regardless of site policy

    

13. quarkiverse

    11 2 54 4.5 JavaScript

    hub.quarkiverse.io - Repository for contributing to quarkiverse wiki

    

14. productivityowl

    12 1 46 0.0 JavaScript

    Productivity Owl is the number one Open Source owl based productivity solution.

    

15. AutoPause

    13 16 43 7.0 JavaScript

    Browser extension to pause other audio and video sources if audio is playing on the active tab with automatic resume, fast forward and media controls.

    

16. chromeIPass

    14 0 12 7.3 JavaScript

    Extensions to allow Chrome to auto form-fill passwords from KeePass (requires KeePassHttp)

    

17. password-backup-tool

    15 1 11 0.0 JavaScript

    Pale Moon add-on that exports and imports passwords

    

18. save-all-images

    16 1 11 0.0 JavaScript

    Save All Images - save images from pages and tabs for Pale Moon

    

19. speed-start

    17 1 10 0.0 JavaScript

    Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks for Firefox, Pale Moon and SeaMonkey.

    

20. json-formatter

    18 1 9 4.8 JavaScript

    A Browser Extension to format JSON in the browser automatically. Available with 60+ Themes, Syntax Highlighting, automatically linkifies links and more. (by arnav-kr)

    

21. G-Meet-Auto-Join

    19 1 8 3.6 JavaScript

    Automatically join G-Meet meetings !

    

22. bye-for-you

    20 1 8 4.7 JavaScript

    Bye "For You" 👋 Is a browser extension that removes the "For You" tab from X (Twitter) and automatically defaults to the "Following" timeline.

    

23. TwitchLiveChannels

    21 1 6 1.8 JavaScript

    Twitch Live Channels helps you keep track of who is LIVE out of the channels you follow on Twitch (https://www.twitch.tv/).

    

24. securityops

    22 1 4 2.9 JavaScript

    Advanced Privacy & Security Extension

    

25. gitgauge

    23 1 4 6.1 JavaScript

    GitGauge — Chrome extension that scores GitHub repository authenticity from stars/forks/watchers/issues ratios.

    

    Project mention: Show HN: GitGauge – A Way to Try Tell If a Repo Is Authentic | news.ycombinator.com | 2026-06-20

26. SaaSHub

    www.saashub.com sponsored

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    

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• Does anyone know if there is a XKit Rewritten equivalent for Pale Moon?

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• which has the most extensions

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• A note from our sponsor - AppSignal
  www.appsignal.com | 11 Oct 2026

  APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product. Learn more →

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Sponsored

Monitoring that respects your time & budget

APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.

www.appsignal.com

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