Kindly check my reply to @rollsicecream regarding functionality. For battery life I just monitor the battery percentage level on my laptop. My OS settings have been set to prioritise battery life. Same for GPU customisation.
I really like Firefox and it works superbly. If you know any extensions that are helpful for academic work it would really help. Sometimes I have come across one or 2 websites which suggest using Chromium, but I was able to use them nonetheless.
I use Brave on Android too, but on desktop I can’t seem to use it without draining a lot of battery.
What I essentially need is a suggestion on a Firefox (fork) to use and some recommended extensions and settings to maximise battery life and add useful features for education.