Final_act :
As of late I've encountered problems with firefox. So I have to know which one to use.
babachoo :
1. Avoid Google and any/all of its products at any cost. If you're not familiar with Eric Schmidt's quote on privacy, look it up on www.startpage.com.
2. This means not using Chrome, Droid OS, Youtube, google.com, and always always using noscript to block any/all google scripts that run on pretty much EVERY webpage in existence. googlesyndication.com and google-analytics.com are huge privacy invaders, as well as everything involved with google. Seriously, avoid them like the plague.
If that is the advice you are going to give, you might as well ask him to disconnect from the internet...
The question is regarding browser safety.. If you think about it, the internet surfer himself is the safest browser. Watch what sites you go to and be careful about what you click. If you don't want viruses, spyware, malware, etc use some discernment and stay away from suspicious or unfamiliar websites.
Most importantly, have good anti-virus software and a firewall. If you have these, you shouldn't need to worry about which browser to use.
If you have a problem with firefox - fix it or get another browser. You might want to try several browsers to see what fits your tastes.
As far as safety, I don't think you need to worry about Google violating it. You don't need to go rolling down the street in an armored tank, just stay away from the bad parts of town.