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mLearn Browser Extension icon

Browser Extension

Add interactive subtitles and word lookups to any streaming site.

v1.0.1

mLearn Browser Extension

Chrome, Edge, Brave, and Firefox compatible. Built from the mLearn source.

Download Extension (180 KB)

What it does

  • Syncs subtitles from streaming sites into the mLearn overlay window
  • Watch Together — sync playback with friends (even without the app installed)
  • Headless Mode — subtitle overlay without the mLearn desktop app running
  • Click any word for instant lookup (requires mLearn desktop app)
  • Open mLearn overlay directly from the extension popup

How to install

1

Download and unzip

Click the download button above to get mlearn-extension-v1.0.1.zip. Unzip the file anywhere on your computer — the extension folder is named dist inside the archive.

2

Open your browser's extension page

Navigate to your browser's extension management page:

Chrome / Brave / Edge: Go to chrome://extensions (or brave://extensions / edge://extensions) in the address bar.
Firefox: Go to about:debugging#/runtime/this-firefox.

3

Enable Developer Mode

Chrome / Brave / Edge: Toggle "Developer mode" on (top-right corner).
Firefox: No developer mode needed — just click "Load Temporary Add-on".

Tip: Developer Mode is required because the extension isn't published on the Chrome Web Store. It's sideloaded locally — perfectly safe since you built it from source.
4

Load the extension

Chrome / Brave / Edge: Click "Load unpacked" and select the dist folder (the one you unzipped).
Firefox: Click "Load Temporary Add-on" and select manifest.json inside the dist folder.

Note: The extension icon will appear in your browser toolbar. Pin it for quick access. On Firefox, the temporary add-on will be removed when you close the browser — you'll need to reload it next time.
5

Using the extension

Click the mLearn icon in your toolbar to open the popup. It will try to connect to the mLearn desktop app automatically.

With the mLearn app running: Subtitles from streaming sites are piped directly into the overlay. Click any word for an instant definition.

Without the app (Headless Mode): Enable "Headless Mode" in the extension popup. You can load subtitle files manually and use Watch Together without the desktop app.

Need help?

Check the tutorial page for video guides, or open an issue on GitHub.