fx_cast is an open-source Firefox extension that makes Chromecast work on Firefox. This is good news for users who prefer Google services but use browsers other than Google Chrome. It solves the problems of users who want to cast content from Firefox to Chromecast. Thanks to the Chrome Sender API.
However, it’s important to note that if you only have the fx_cast extension installed, it won’t work right away, you will also need to use the bridge application on your PC so that it can handle communication with the receiver. Once the fx_cast extension and bridge application has been installed, simply click the Cast button on the toolbar and your Firefox content (such as YouTube, Netflix) will go to the TV screen. Because this extension is in its infancy, there may be bugs, and problems like random crashes should be quite common and should not be surprising.
You can download the open source extension fx_cast here.