Caster extension

A Firefox for Android extension that finds videos on the page you're viewing and casts them to a Chromecast with the Caster app.

What it does

• Detects videos two ways: scanning the page for <video> elements (in every frame) and sniffing network traffic for media streams (HLS, DASH, MP4, WebM, …).
• When videos are found, a floating cast button slides in over the page. Tapping it opens a panel listing each source with its type, resolution, and duration.
• Tapping a source hands the URL to the Caster app via an Android intent — the URL is passed exactly as found, so the stream plays directly over your LAN.

Requirements

• Firefox for Android 142 or later.
• The Caster app installed on the same device.

Installing

Install it from addons.mozilla.org, grab the xpi from Releases, or build the package yourself:

zip -r -FS caster-extension.xpi manifest.json background.js scanner.js ui.js content.css options.html options.js icons LICENSE

Release Firefox for Android only installs signed extensions, so load a self-built xpi in Firefox Nightly: Settings → Extensions → Install extension from file.

Support

If you find this project useful, you can support development:

License

GPL-3.0-or-later