Please check if all your plugins are up-to-date. To do this, go to the [http://mozilla.com/plugincheck Mozilla Plugin Check site]. Once you're there, the site will check if all your plugins have the latest versions. If you see plugins in the list that have a yellow ''Update'' button or a red ''Update now'' button, please update these immediately. To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure. '''Try the Firefox Safe Mode''' to see how it works there. The Safe Mode is a troubleshooting mode, which disables most add-ons.'' ''(If you're not using it, switch to the Default theme.)'' * You can open the Firefox 4.0+ Safe Mode by holding the '''Shift''' key when you use the Firefox desktop or Start menu shortcut. * Or use the Help menu item and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running. ''Don't select anything right now, just use "'Start in Safe Mode"'' ''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shift key) to open it again.'' '''''If it is good in the Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshooting extensions and themes]] article for that. ''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''