Форум поддержки Firefox

Hi! Yesterday i updated my firefox to last version and i got my UI way too big, so today i looked online for some fix on that. I found a fix saying if you add a line in about:config site with the parameter "ui.textScaleFactor" with a value of 100 it will be fixed. but by mistake i changed it to 10 insted of 100 so when i open firefox i have a super big black screen

most of my problems are i can't reinstall firefox because it made the same weird big ui problem. There is any way to fix it?

thanks in advance

My web pages have increased in size on their own. I tried shrinking the font size a bit but it is not the font but the pages (borders, etc)....how do I get it back to normal and why did it do this?