JavaScript
Implementation of the Chrome Sender API (Chromecast) within Firefox

fx_cast

Very WIP! Not ready for release. Expect many bugs. Please don't sign builds on AMO with current ID.

Credit:

• electron-chromecast
• node-castv2
• chrome-native-messaging
• icons8

Supported platforms

• Linux
• macOS
• Windows

Installing

Install the Firefox extension and companion bridge application. Downloads can be found on the website or in the GitHub releases section.

macOS/Windows versions have installers, Linux packages can be installed via the command line:

# Debian/Ubuntu
sudo dpkg -i fx_cast_bridge.deb

# Fedora
sudo dnf install fx_cast_bridge-<version>.<arch>.rpm

Package managers

• Arch Linux (AUR) - https://aur.archlinux.org/packages/fx_cast/

  yay -S fx_cast

Building

Requirements

• NodeJS
• dpkg (for building deb packages)
• rpm (for building rpm packages)
• macOS (for building macOS installer packages)

Installing dependencies

macOS:

brew install dpkg rpm

Debian/Ubuntu:

sudo apt install dpkg rpm

Fedora:

sudo dnf install dpkg rpm-build

Archlinux:

At the moment, pkg has a bug, until fixed nodejs has to be downgraded to 10.12.0:

sudo pacman -S nvm dpkg
yay -S rpm-org
echo 'source /usr/share/nvm/init-nvm.sh' >> ~/.bashrc
nvm install 10.12.0

Instructions

git clone https://github.com/hensm/fx_cast.git
cd fx_cast
npm install
npm run build
npm run install-manifest

This will build the ext and app, outputting to dist/:

• dist/app/

  ... contains the bridge binary and manifest with the path pointing that binary. install-manifest copies this manifest to the proper location (or adds its current location to the registry).

• dist/ext/

  ... contains the unpacked extension.

Watching ext changes:

npm run watch --prefix ./ext

Launch Firefox and auto-reload on rebuild (run in separate terminal):

npm run start --prefix ./ext

Packaging

Packaging currently only possible for macOS/Linux. macOS packages can only be created on macOS, Linux .deb/.rpm packages can be built on any platform with dpkg-deb and rpmbuild binaries.

• dist/app/

  ... contains the installer package: fx_cast_bridge.(pkg|deb|rpm|exe)

• dist/ext/

  ... contains the built extension in the format fx_cast-<version>.zip.

Build and package app and extension for current platform:

npm run package

Build and package app for linux platforms:

npm run package --prefix ./app -- --platform=linux --packageType=deb
npm run package --prefix ./app -- --platform=linux --packageType=rpm

Package script arguments

• --platform "win","mac","linux"
  Select the platform to build for.
• --packageType "deb","rpm"
  Select the package type. Defaults to deb. Only relevant when building for Linux.

Testing

Testing requires geckodriver (or chromedriver for Chrome parity testing). See selenium-webdriver installation instructions (ignore npm install).

Test results will be displayed within the opened browser tab.

npm run build --prefix ./app
npm run install-manifest
npm run package --prefix ./ext
npm test
SELENIUM_BROWSER=chrome npm test

Usage

Extension can be loaded from about:debugging as a temporary extension.

Most sites won't load the cast API unless the browser presents itself as Chrome. The extension includes a method of spoofing the user agent string, sites can be whitelisted via the options page. Whitelist entries are specified as match patterns. To whitelist all sites, add <all_urls> to the whitelist, though this could cause breakage on random sites.

HTML5 media elements have a "Cast..." context menu item that triggers a sender application. Only works on remote (non-local) media that isn't DRM-encumbered.

Cast-enabled websites will load the sender API shim and display a cast button as in Chrome, provided there are no bugs/incompatibilities with the shim.

Video Demos

Netflix / HTML5: