search doesn't work

I was looking for a popup blocker. Found one and tried to down load it. I never got a down load complete. I checked the control panel to see if it was listed in the program list.It wasn't. So I tried to do another search for pop up blockers. I got another list of pop up blockers to try but when I tried to go to a new one I got a 404 error. I am using FF browser. I started my search from my Verizon/yahoo home page search box. ???