How to Cast Chromecast on Firefox? [2019] - TechyMice
Road-Test sending video to Chromecast and Roku in Firefox for Android Beta - Future Releases
Despite the recent MA app upgrade for 4K on Chromecast with Google TV, DRM issues affecting Chrome and Firefox now seem to be hitting Android apps. Worked fine this morning. from mozilla
fx_cast Adds Chromecast Support To Firefox - Linux Uprising Blog
Firefox for Android Now Supports Google Chromecast
New Firefox extension "fx_cast" lets you Chromecast videos from Netflix, YouTube, and more