You can find the installation path of all plugins on the about:plugins page. You can open the about:plugins page via the location/address bar.

• http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins
• http://kb.mozillazine.org/about:plugins

See also "Manually uninstalling a plugin":

• https://support.mozilla.org/kb/Troubleshooting+plugins

Extensions are options you install into Firefox, They can be removed at will. Plugins are from programs that Firefox finds already on your system.

An extension without a Remove button is really a plugin. The only way to remove a plugin is to remove its program from your system. However, you can disable extensions and plugins if you want.

Thanks for your responses. I had already viewed the help topics you posted above, so I searched my system for every file related to the plugins I could find and removed them all. However, when I reinstall Firefox, the plugins are still there. This is why I'm so confused. Any other suggestions?

List the plugins in question.

Try to delete the pluginreg.dat file in the Firefox Profile Folder and maybe addons.sqlite as well to reset the plugin registry databases.

See Re-initializing the plugins database:

• https://support.mozilla.org/kb/troubleshoot-issues-with-plugins-fix-problems

You can use this button to go to the current Firefox profile folder:

• Help -> Troubleshooting Information -> Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

Thanks for your help! After searching through some more hidden files, I was able to locate the extensions in question and delete them.

Is everything okay now?