Hi, Please check if this happens in [https://support.mozilla.com/en-US/kb/Safe%20Mode Safe Mode.] If possible please also try to rule out hardware / mouse settings issues. ............................................................................................................................... Useful links: [https://support.mozilla.com/en-US/kb/Options%20window All about Tools > Options] [http://kb.mozillazine.org/About:config Going beyond Tools > Options - about:config] [http://kb.mozillazine.org/About:config_entries about:config Entries] [https://support.mozilla.com/en-US/kb/Page%20Info%20window Page Info] Tools (Alt + T) > Page Info, Right-click > View Page Info [https://support.mozilla.com/en-US/kb/Keyboard%20shortcuts Keyboard Shortcuts] [https://support.mozilla.com/en-US/kb/Viewing%20video%20in%20Firefox%20without%20a%20plugin Viewing Video without Plugins] [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files] [https://developer.mozilla.org/en/Command_Line_Options#Browser Firefox Commands] [https://support.mozilla.com/en-US/kb/Basic%20Troubleshooting Basic Troubleshooting] [https://support.mozilla.com/en-US/kb/common-questions-after-upgrading-firefox-36 After Upgrading] [https://support.mozilla.com/en-US/kb/Safe%20Mode Safe Mode] [http://kb.mozillazine.org/Problematic_extensions Problematic Extensions] [https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes Troubleshooting Extensions and Themes] [https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins Troubleshooting Plugins] [http://kb.mozillazine.org/Testing_plugins Testing Plugins]

Thanks for all of the links. The good news is that the problem did not occur when I clicked on any of the links you supplied. I did update a couple of add-ons but I don't see myself opening Firefox in safe mode every time I go online. I was hoping that someone had the same problem and thus knew exactly what was causing it. Thanks again for your help although I am still hoping for a less complicated solution.

You get that problem if you select the Firefox program to handle a file if you get an "open with" dialog. *https://support.mozilla.org/kb/Firefox+keeps+opening+many+tabs+or+windows

Thanks cor-el. These steps appear to directly apply to the problems I have be experiencing. I made a few changes although I haven't yet tried to see if the changes worked. I'll save your answer for a while in case I have to try the more radical changes. Thanks again for finding the answer to my issue.