privacy.resistFingerprinting breaks a lot more than just themes. Many of the weird problems reported in Firefox (and forks) are just from enabling it.
It has some pros but also TONNES of cons. Everything from a completely blank page to wrong timestamps to poor textures and so much more. Sometimes you will be flagged as a bot and prompted with literally infinite puzzles, thus effectively banning you from a website.
Some of these problems get fixed but new ones also get born. I personally use it but I also expect breakage and worse performance.
Android recommendations for next version:
I suggest QR Scanner because it can both read and generate and does not ask for network access unlike Binary Eye. It has a intuitive and nice UI but also manages to do advanced stuff.
Thunderbird is already on the list but there’s an android version now. It’s based on K-9 and has gotten really good for a mobile e-mail client.
I know a lot of people like Breezy Weather (I was one of them) but the simplicity of Bura makes it perfect in my eyes. The fact that it doesn’t have a graph for air quality or animated lock screens that match the weather makes it a fraction of the weight, really fast and does not ask for even half of the same permissions. I switched to Bura after noticing that it doesn’t need to run in the background since it’s so fast when you open it. It’s still prettier than the absolute most basic ones though.