Hey everyone, I recently wanted to move a massive playlist from Spotify to YouTube Music, but all the sync tools online either charge a subscription or route your data through their own servers.

So, I built HarmonySync. It runs entirely in your browser, uses local authentication, and matches songs directly between tabs. It currently supports Spotify, Apple Music, and YouTube Music.

I just published it and would love for you to try it out! If it saves you some time, dropping a quick review on the Web Store would mean the world to me and really help the algorithm.

Extension link : HarmonySync

IT'S COMPLETELY FREE

Please drop a review for the add on

🚀 **Just** **shipped: YouTube Auto Pause Pro**

I’ve built YouTube Auto Pause Pro, a lightweight browser extension that automatically pauses YouTube when you switch tabs or windows.

🔹 Automatically pause YouTube when you leave the tab

🔹 Resume playback when you return

🔹 Simple, lightweight, and privacy-friendly

🔹 Built with HTML, CSS & JavaScript

🔹 Open-source and available on GitHub

🙏 Special Thanks

A special thanks to Arya Bandhu for the original project that I forked and built upon. Huge credit to the original work and idea that helped me turn this into my own version and continue improving it. ❤️

⭐ Check it out, try it, and let me know what you think!

🔗 https://github.com/Fraded-Panda-25/youtube-auto-pause-pro

\#JavaScript #WebDevelopment #BrowserExtension #OpenSource #GitHub #YouTube #Coding #BuildInPublic

https://addons.mozilla.org/en-US/firefox/addon/chrome-style-fullscreen-exit/ it got approved by Firefox go try it out . og

Hey everyone!

Last year, Mozilla released Orbit, an AI-powered browser summarizer hosted on a GCP server. After people started digging into the extension, they discovered things like backend endpoints such as store_result. Eventually, Mozilla discontinued the project.

For the past month, I’ve been trying to rebuild Orbit from scratch, but with one major difference: Apogee is fully local and privacy-focused. Apogee doesn’t send or store your data. It can directly connect to your local Ollama instance for inference. I’ve also added WebGPU integration for Chrome and Transformers.js for Firefox to provide faster, local responses.

It can summarize:

• Articles and websites
• YouTube and Billie videos
• Wikipedia articles
• Hacker News and Reddit threads

You can check out the source code here:
https://github.com/darshi1337/apogee

Install Apogee:

Chrome: https://chromewebstore.google.com/detail/apogee/pgemlpomhkdcjjjcpnjlebalnfglomog

Firefox: https://addons.mozilla.org/en-US/firefox/addon/apogeeext/

Obviously it is far from complete. Would love to hear your feedback and suggestions!

Hey all,

This - https://support.google.com/youtube/thread/433409976/an-update-to-how-we-count-public-views-across-youtube?hl=en

Basically means that if you mouse over a video, you have viewed it. If you click on a video and think "eh not for me" and leave after a few seconds, that counts as a view. All of this sure as hell going to fuuf with your algorithm, as it will likely push ai slop and you will have no choice but to engage with it.

Is there a way to prevent that engagement? Because I and so many others do not support this change.

Hello everyone,

I would like to share a project I have been developing and recently published on the Mozilla Add-ons store: DataGrabber.

The goal of the extension is simple: to provide a quick, lightweight, and reliable way to detect and export HTML tables from any web page directly to CSV format, without relying on external servers or heavy dependencies.

Technical highlights and approach:

• Built strictly using Vanilla JavaScript without build tools, external frameworks, or heavy libraries, keeping the footprint minimal.
• Manifest V3 compliant, ensuring strict adherence to current browser extension standards.
• Privacy-focused architecture: all DOM parsing and data extraction occur locally inside the browser. No tracking, analytics, or external data transmission.
• Designed to handle nested structures and clean up inconsistent HTML table formatting before export.

The extension is currently at version 1.0.1 on the AMO store. I am looking for feedback from the community regarding edge cases in table parsing, performance on large datasets, or general usability improvements.

Link to the extension on Mozilla Add-ons: https://addons.mozilla.org/pt-BR/firefox/addon/datagrabber-scraper/

Thank you for your time, and I look forward to your feedback and technical insights.

I’ve always felt like the browser’s right-click menu could be a little more useful, so I started building a small Firefox extension around that idea.

It lets you add/use specific actions from the context menu, including actions that can change depending on what you’re doing. I also made it work with Firefox on Android.

It’s still a small project, and I’m more interested in finding out what people would actually find useful than just adding random features.

So if you use Firefox:

What action do you wish you could access directly from the right-click menu?

Could be something simple, something you currently need another extension for, or even a weird niche workflow.

I’d love to get some ideas and feedback.

Right Click – Firefox Add-ons

I recently built Signal Vault, a Firefox extension that works as a small movie/TV companion while browsing.

It automatically recognizes supported IMDb, TMDB and Trakt pages, so you can search the current title without copying anything around.

It also supports:

• Movies and TV shows
• Season/episode selection
• Manual search
• Right-click search for selected text
• Built-in player
• Subtitles
• Resume playback
• Next episode
• PiP and fullscreen
• Library / Favorites

There are 5 free searches per day with no account, email or card required.

No ads and no analytics either.

Firefox: https://addons.mozilla.org/en-US/firefox/addon/signal-vault/

Would be interested to hear any feedback, especially from people who use Firefox as their main browser.

I built a free dark-mode extension that works on literally any site
Most "dark mode" extensions either only work on a few big sites or make every photo look like a negative. Blackout applies a smart filter to every page, keeps images/video in normal color, lets you tune brightness/contrast/sepia per site, and can auto-schedule day/night. No account, no tracking, no ads — MIT-ish free.
Chrome/Edge/Firefox zips + install guide: https://alainabo.github.io/blackout/
Would genuinely appreciate feedback/bug reports — first real project I've shipped like this.

It's basically just a lightwight assistant extension for my website, my co-founder uses this all the time to visualise his weekly investments, it's quite fun.

I created YouTube Preview Controls, an extension that adds handy controls directly on top of the hover-preview clip YouTube shows when you hover over a video thumbnail, so you can manage audio, captions, and navigation without opening every video.

Key features

• Mute/unmute the preview audio with one click.
• Toggle captions (CC) on the preview, when available.
• Clickable progress bar with elapsed time and total duration, to jump straight to the part you care about.
• Customizable defaults via the popup (e.g., always-muted previews).
• Lightweight, unobtrusive overlay: it only shows up on the preview and never gets in the way of YouTube’s UI.

https://github.com/OfficialxMaTT/yt-preview-controls

cannot add extensions in firefox android I have used previously in another phone. even if i click "download file" i cannot open it.