Are you using Firefox Sync ? Use a adblocker

• https://addons.mozilla.org/en-GB/firefox/search/?platform=windows&q=adblocker

and a Cookie Manager

• https://addons.mozilla.org/en-GB/firefox/search/?platform=windows&q=Cookie+Manager

Clear your Flash Cache open from Control Panel Clear your Cache.

I Can not figure out the why to stop it as of yet.

Many websites can add themselves to bookmark/favorite listings when the user tells it to. Could you be doing this by accident?

The System Details list shows this extension that might be responsoble:

• iCloud Bookmarks 2.1.10 (firefoxdav@icloud.com)

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems