This one is flashable with magisk

https://xdaforums.com/t/mod-magisk-root-set-charging-limit-to-80-85-90-95-v2.4482011/

Iceraven has more options like I can hide that ugly homepage that Firefox made mandatory to see every time you open/return to the browser. also has the option to remove that permanent qr code camera shortcut next to the address bar.

My medical app doesn’t let me take a screenshot of the bill statement when I wanted to contest an upcharge.

luckily there was still an option to download a pdf, but still there was no option at all to disable that BS.