When i use all of my internet limit it limits my internet, on firefox websites are unusable. Is there browser for android with following features:
Preferably on F-Droid
Just load text
Edit:
For now solution is firefox + ublock (adnauseum) and in settings of ublock check block JavaScript and block elements over 10kb


Adnauseum is the opposite of bandwidth saving in your case. It sends a request to ad trackers reducing the impact of your the data usage reduction.
Remove Adnauseum and switch to Ublock-origin. 64kbps was a data speed I think I saw in 2010/2012 and maybe, 2014 when I used to exhaust my data limit.
You need every data saving measure you can get. I would block 3rd party requests if you haven’t already to reduce the bandwidth needed even further.