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100% spot on. Too many features missing. The flashing procedure is problematic as well (for the ZTE "open" C you need a custom patch found in a bug report, and you have to be extremely carefull not to brick the device.) I purchased a ZTE Open C just to try out Firefox and the internet browsing experience. You can't change tabs unless you scroll all the way to the top, otherwise the address bar is hidden. Needless to…
That is confusing. The behavior is similar/equal to the Android Firefox: Scroll down, address bar goes off-screen. Want it back? Scroll a small amount up, albeit rapidly. Think 'pull down' on the content. Did you mias that (we can argue about whether that's intuitive) or does that plain not work for you? Scrolling back to the top should definitely be unnecessary.. Works just fine for me (typing on Android, in Aurora)…
It's another great example of how the Firefox developers have added in functionality that just makes the browsing experience less efficient or more confusing, without any real benefit. Getting a sliver more of screen space just isn't worth the inconvenience this "feature" brings, especially on larger mobile devices.
Disabling it via 'Settings' -> 'Display' -> 'Scroll title bar' was the first thing I had to do when trying out Firefox on Android, and that was just to bring it up to a minimal level of usability.