As stated before, using the Libertine Tweak Tool available from the Open Store, allows you to set gui sizing and large scroll bars for apps in libertine containers, that make them much more usable mobile form factors. Also - installing the Scroll Anywhere extension and setting it for "Grab and Drag" behavior allows scrolling via touch for Firefox. Firefox unfortunately still will be much slower and less responsive than Morph is on UT.
I unfortunately live in "far far away Europe country" where it's hard to purchase bq or meizu... that's why I've chosen Nexus as it is still avaliable here 😉
Thank You for explanation, I found out that flo and deb has camera on the right side in the top bar and previous 2012 model has it in the centre of top bar. I also asked resellers for pictures of fastboot mode to make sure. (The problem was that they marked their devices as just nexus 7).
Mentioned problems (with bluetooth) are acceptable for my needs.
In future I wish I have pinephone and pinetab but for now they are not ready.
Once again big thanks 🙂 I'll mark thread as solved.