Just to confirm what jdstrand has already said disabling Add-ons and running in safe mode makes no difference. I had to follow his advice regarding 'ui.use_unity_menubar = false' in order to stop this behaviour and gain back some battery life as a laptop with a browser that uses 100% CPU every few seconds doesn't last long.
Just to confirm what jdstrand has already said disabling Add-ons and running in safe mode makes no difference. I had to follow his advice regarding 'ui.use_ unity_menubar = false' in order to stop this behaviour and gain back some battery life as a laptop with a browser that uses 100% CPU every few seconds doesn't last long.