Extensions can sometimes be the cause of problems. If the problem does not occur in Safe Mode, then you can disable your extensions one-by-one until you find out which one is causing the problem. See [[Troubleshooting extensions and themes]] OR Try clearing your cache and cookies. # Open the Tools menu, then select Clear Recent History... . # In the '''Time Range to clear:''' drop-down, select '''Everything'''. # Click the arrow next to '''Details''' to display the list of items that can be cleared. # Select both '''Cookies''' and '''Cache'''. # Click Clear Now .

You can also try [[Safe Mode]]