Firefox redirects me to yahoo when i go to facebook
Alla svar (1)
Your issue may be caused by Malware. You can run and update the following free anti virus software:
1. Malwarebytes (Free version) - http://www.malwarebytes.org
2. Spybot Search & Destroy - http://www.safer-networking.org
3.Spyware Terminator - http://www.spywareterminator.com
In addition, there are a number of forums you can use to help get rid of your infection. These include: