Firefox security issues

Hey Folks,

I heard a rumor about security being compromised for firefox (i'm using 1.5.0.8) and i'm a little worried about doing some online banking at this point. Can anybody either confirm or deny these rumors? Also, I've got safari that i've never really used. Would this be a good alternative for doing my online banking.

-I'd rather use firefox though.. love the multitabs and just the look and feel to it.

thx guys

no link.. just a rumor i heard from a friend of mine... i grabbed the latest firefox thx for that..