Firefox 5.0 screen is not centered on computer screen. Research indicates that running restart with Add-ons Disabled will correct the problem and it does, but you then lose the Add-on feature. Restarting the computer re-enables the Add-on feature and throws the screen to off center again. Has anyone encountered this problem and found a solution that will restore the screen to its proper position and restore the functionality of the Add-on feature? This does not happen with IE.