Seems like my browser has been hijacked. I am getting ads that automatically generate.
Does this happen as soon as you start Firefox? Or does it
happen as you surf the web? Go to the Mozilla store and search
for pop-up and ad blockers. https://addons.mozilla.org/en-US/firefox/
Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
Further information can be found in the Troubleshoot Firefox issues caused by malware article.
Did this fix your problems? Please report back to us!