A niche but growing phenomenon is cloud gaming. Cloud gaming has giant data centers running a game you want to play and then streams that game to your device. With this it can allow you to use older hardware cloud gaming, Mobile-Android, Desktop, Mobile-iOSthat might not be able to run the game otherwise. This also allows you to save on storage space on your computer. With all of this I keep having to go back to Chrome because no cloud streaming service supports playing through the Firefox browser. I hope Firefox can speak to these companies and make it to so their browser can be supported.
For context i will link some of the more popular streaming services to show they do not allow using a Firefox browser
https://www.amazon.com/luna/getting-started
https://support.xbox.com/en-US/help/games-apps/cloud-gaming/supported_browsers
https://www.nvidia.com/en-us/geforce-now/system-reqs/#browser