Mozilla has lost their way with Firefox, and are becoming like MS. They have a slow, bloated browser that runs terribly on Android. Instead of trying to make the best browser for the platform, they created FF OS, locking the user into their platform and API standards, just like MS tried to do when it bundled IE in Windows.
I had a WebOS phone and despite loving the beautiful UI and it being ahead of iOS in many ways like notifications and task switching, I dumped it. HTML5 killed the user experience. I need fast, responsive apps that only Android and iOS can deliver.
There's no way I'd ever go back to generic, laggy, HTML5 Apps.