you can record without consent if you want.
but you can be sued and pay damages if the recording goes in public/you share it with other people etc
in some countries is ilegal to record without consent.
you could replace your battery every 6 months
but make sure you get genuine one (from official service, no clue if they still sell for this model) not some shady chinese aftermarket option
the listed alternatives wont give much performance boost.skip and wait the newer phones with bigger batteries 7000mah+ and with better new gen soc/cpu/gpu.
i hoped there are some config values that i am unaware of to do the changes i want.
open source = some parts of the code can be open at best, it isnt what it sound. license matters. this word is just a trick.
yet, i wouldnt count on someone auditing code, there was lots of big projects with trully open code that had bad code injected for decades and noone noticed.
as much as i know, those extensions call back on developer server for updates/new filters etc. so i skip.
you dont know but yet you talk rubbish