How do I remove ad.yieldmanager.com in firefox 12.0 I already went to tools, options, privacy, use custom settings for history and then exceptions added "ad.yieldmanager.com" to be blocked. Cleaned out all cookies. It still pops up when I log onto Firefox just below my tool bars. I have run Avast Antivirus, Malwarebytes, Spyware Terminator 2012 and these did not help either.
Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).
Don't make any changes on the Safe mode start window.
If sites reopen automatically when you start Firefox then try to delete the sessionstore.js file and possible sessionstore-##.js files with a number and sessionstore.bak in the Firefox Profile Folder in case there is a problem with the file.
Help > Troubleshooting Information > Profile Directory: Open Containing Folder