How can I rid my Firefox of this redirecter virus?

I don’t know where I could have gone to pick up this thing, but suddenly, when I surf onto websites from a Google search, I’m being “redirected” to some webpage called c.enhance, except it won’t go through and I end up with a Firefox screen that says “Firefox can’t connect to c.enhance.” At least it doesn’t go through.

I take it that it’s some hijacking virus horsepucky or other. As if I suddenly being on their site would make me think “Wow! Let me buy this junk! How did I ever live without it?” :P

I ran Anti-Malwarebytes and Spyware Blaster, but no dice, it’s still happening. Help, etc.