since today I have a very annoying bug, opening a new tab in Chrome can make my system crash and I have to reboot. When I right click with you mouse in Chrome I see a black box instead of the standard contextual menu.
Also in Firefox, tabs have a weird shadow I didn't had before. (on the left)
The 2 browsers are far slower than before. I don't understand because I didn't changed any of my window manager / desktop settings recently.