I-Firefox ye-Android Isithangami Sokwesekwa

I cannot even upload multiple screenshots, it is stuck at uploading. Everywhere fonts are just like this. The whole browser is unusable. I switched from Chromium and it's just giving me more and more issues here. I had to tweak dev options, config, and what not. And even after all that, now fonts are dead.

I am using three extensions: uBlock, AdGuard, and DarkReader and none of them are messing up.

Ever tried to download a file through firefox and then pause it to resume it after sometime and end up having the rest of the file being downloaded in an instant but upon opening realise the file has been corrupted. I am facing this issue like so frequently it has become like a norm that pausing a downloading file will give a corrupted one for sure. And please note that other browsers don't reproduce the issue infact the links are pause supported in all aspects

The same website opens repeatedly in a new tab. It's a trusted website (public library). I've run a virus scan and looked for solutions but can't find the problem. Any ideas please?