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Top 23 Extension Open-Source Projects
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FileBrowser Documentation
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metamask-extension
:globe_with_meridians: :electric_plug: The MetaMask browser extension enables browsing Ethereum blockchain enabled websites
Project mention: Using Drosera Traps to Investigate a Vulnerable Smart Contract | dev.to | 2025-02-17Make sure Metamask is connected on remix, and if your wallet does not have faucet, you can fund it using this link.
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I'm surprised no one has mentioned Surfingkeys https://github.com/brookhong/Surfingkeys. I switched over from Vimium a couple years ago. I think its more performant than Vimium and also allows you quite a bit more flexibility in your configuration.
I prefer and recommend browser add-ons over Nyxt. You'll get more compatibility by being able to use Chrome/Firefox. You'll also have a much higher chance of being able to use the same environment at work - since you can typically still install browser add-ons in developer mode even if you aren't able to get rights to install apps.
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ProjectVisBug
FireBug for designers › Edit any webpage, in any state https://a.nerdy.dev/gimme-visbug
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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The only workflow change was switching IDEs, from VSCode/Copilot to Windsurf/Cascade, as it was depicted as a more performant AI regarding the app context.
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tamperchrome
Tamper Dev is an extension that allows you to intercept and edit HTTP/HTTPS requests and responses as they happen without the need of a proxy. Works across all operating systems (including Chrome OS).
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Project mention: Plasmo – a framework for building modern Chrome extensions | news.ycombinator.com | 2024-08-20
i built a chrome extension recently and i was evaluating/trying out different frameworks for building a browser extension.
for anyone who is interested for an alternative to Plasmo, i chanced upon https://github.com/extension-js/extension.js
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FastForward
Don't waste your time with compliance. FastForward automatically skips annoying link shorteners.
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youtube
[top~1 open YouTube & Video browser-extension] - Enrich your experience & choice! 🧰180+ options & clever features 📌set+forget📌Longest-standing(been tough). Please join🧩us👨👩👧👧 ..⋮ {playback|content discovery|player|extra buttons|distractions|related videos|shorts|ads|quality|codec|full tab|full screen} (by code-charity)
Browser Extensions: As mentioned in my previous blogs when I worked on the ImprovedTube extension - I have recently been invested in learning more about browser extensions. The work I did for Le Git Graph, has taught me about the complexities of integrating with existing web applications (you have to know a lot about GitHub's interface in order to manipulate it!). Working on this extension made realize GitHub's dynamic nature requires me to carefully handle different page states and navigation patterns - and even then, there might be things that change and I'll have to update the code accordingly.
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isometric-contributions
Browser extension for rendering an isometric pixel art version of your GitHub contribution graph.
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Project mention: PowerToys Run: extensible quick launcher for power users | news.ycombinator.com | 2024-07-07
If you couple those two, you have a launcher that is able to find all files on your drive very fast (and launch applications of course).
[1] https://github.com/lin-ycv/EverythingPowerToys
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sd-webui-lobe-theme
🅰️ Lobe theme - The modern theme for stable diffusion webui, exquisite interface design, highly customizable UI, and efficiency boosting features.
Project mention: Upscayl – Free and Open Source AI Image Upscaler | news.ycombinator.com | 2024-03-31upscayl is very approachable, but lacked many features i needed. i ended up using https://github.com/AUTOMATIC1111/stable-diffusion-webui after upscaling became part of my regular workflow, but for someone who just needs a few images enhanced, it's an ideal tool.
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aide
Conquer Any Code in VSCode: One-Click Comments, Conversions, UI-to-Code, and AI Batch Processing of Files! 在 VSCode 中征服任何代码：一键注释、转换、UI 图生成代码、AI 批量处理文件！💪 (by nicepkg)
Project mention: An AI VSCode extension that does not directly compete with Copilot/Codeium | news.ycombinator.com | 2024-07-21 -
fadblock
Friendly Adblock for YouTube: A fast, lightweight, and undetectable YouTube Ads Blocker for Chrome, Opera and Firefox.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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).
Extension discussion
Extension related posts
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One click Search Engine switcher for Chrome and Firefox
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Using Drosera Traps to Investigate a Vulnerable Smart Contract
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History 2701 Wiki
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Phind 2: Reinventing AI search with visual answers and multi-step reasoning
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Creating a Browser Extension in 2025
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🔭 Compiling 2025 : pushing technical skills for more creativity
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Open Heart Protocol
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A note from our sponsor - CodeRabbit
coderabbit.ai | 26 Mar 2025
Index
What are some of the best open-source Extension projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | filemanager | 28,290 |
| 2 | redux-devtools-extension | 13,498 |
| 3 | metamask-extension | 12,421 |
| 4 | Phalcon | 10,808 |
| 5 | Noi | 7,291 |
| 6 | Surfingkeys | 5,571 |
| 7 | ProjectVisBug | 5,540 |
| 8 | codeium.vim | 4,723 |
| 9 | NaughtyAttributes | 4,688 |
| 10 | docker-php-extension-installer | 4,524 |
| 11 | tamperchrome | 4,194 |
| 12 | extension.js | 4,161 |
| 13 | FastForward | 3,682 |
| 14 | youtube | 3,678 |
| 15 | isometric-contributions | 3,526 |
| 16 | awesome-xcode-extensions | 3,141 |
| 17 | EZSwiftExtensions | 2,998 |
| 18 | sd-webui-deforum | 2,783 |
| 19 | EverythingPowerToys | 2,723 |
| 20 | vscode-react-native | 2,660 |
| 21 | sd-webui-lobe-theme | 2,564 |
| 22 | aide | 2,543 |
| 23 | fadblock | 2,422 |
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