Firefox interface is messed up.
Whenever I open Firefox without Safe Mode, it will function for a few seconds, and then stop responding. (NOTE: It does not say "not responding" anywhere; it just appears nonresponsive.) Whenever a piece of the UI needs to change, (e.g., hovering over a button, typing in a search box, LOADING A WEBPAGE...) the entire area turns black. This includes EVERYTHING within the window's boundary: Title bar, tab thumbnails, the ENTIRE FRAME THAT WEB PAGES LOAD IN; all of it.
Safe Mode is currently the only fix for it, (I haven't Reset it yet;) disabling ALL the addons (including themes) didn't help.
hello james, from your description of the problem i suspect it might be related to hardware acceleration. you could either try updating your graphics driver from the amd homepage (please use the 12.9 beta driver for the moment since 12.8 is also known to cause problems with firefox) - or disable hardware acceleration in firefox/tools > options > advanced > general.