I followed all the instructions from Bitdefender. Then also ran a program to delete junk (JRT or junkremoval tool) recommended by an article on malware and I downloaded and ran Malwarebytes Anti-malware Free. This managed to get the damned search hijacker off my Firefox start-up page, but it still pops up when I open a new tab. IT LOOKS LIKE THIS: "www.safesear.ch/?type=20140627-rv-ff-nt"
BTW, Bitdefender wrote to tell me that they don't deal with this kind of program because it is a PUP and has to be downloaded. But for those of us who click too quickly or miss the hijacker for other reasons, are we to be left floating on our own in cyberspace? The damned program is malicious enough to take over many Windows shortcuts and to sneak around all efforts to remove it.
Help appreciated, now that I've finished ranting.