Recently I updated Firefox for OS X (Yosemite) from version 35 (I think) to version 38.0.1. When I load the browser everything is fine, but after using the browser not for long I start getting glitchy pixelated squares all over the window!: - When I scroll up/down they show up all over -When I hover the mouse pointer over a link, the bottom left link display is pixelated and distorted. Any ideas on how to fix this? Never had this sort of issue with Firefox before.... Thanks!