Hello, I understand that you are experiencing an issue with Firefox flashing several windows when entering something in the address line or search bar. Additionally, clicking on an item causes the same behavior without opening the intended page. I'll try to help you with this. To troubleshoot this issue, I would recommend trying the following steps: Clear your browsing history and cache: Go to the menu (three horizontal lines in the top-right corner) > Library > History > Clear Recent History. Select the desired time range and make sure to check the boxes for "Browsing & Download History" and "Cache." Then click on the "Clear Now" button. Disable problematic extensions: Some extensions or add-ons can cause conflicts and result in unusual browser behavior. Try disabling any recently installed or suspicious extensions. You can do this by going to the menu > Add-ons > Extensions and disabling the respective extensions. Restart Firefox in Safe Mode: Launch Firefox in Safe Mode to disable all extensions and themes temporarily. This can help identify if any of them are causing the issue. To start in Safe Mode, click on the menu > Help > Restart with Add-ons Disabled. Update Firefox: Ensure that you are using the latest version of Firefox. Go to the menu > Help > About Firefox, and Firefox will automatically check for updates. If an update is available, it will be downloaded and installed. Create a new Firefox profile: Sometimes, issues can be related to a corrupted user profile. Creating a new profile can help resolve such problems. Follow the instructions in this Mozilla support article to create a new profile: [Link to Mozilla Support Article on creating a new profile] If the issue persists after trying these steps, please provide additional details such as the specific version of Firefox you are using, any recently installed software or updates, and any error messages you encounter. This information will help us further investigate the issue and provide more specific guidance. Thank you for reaching out to the Firefox Support Forum, and I hope these suggestions help resolve the problem you are facing. Let me know if you have any further questions or concerns. Best regards, Suram Firefox Support Volunteer