Mac history spam?

[Mikeyman64]

My sister has a Macbook with fully updated OSX Tiger. She has recently looked at her firefox web history and for Wed and Thur of this past week, there were many unwanted links to youtube that she had no recollection of viewing. Since I'm the geek of the household, she though I might know what it was all about. But since I'm lacking in knowledge of all things Mac (except the iPod Classic software), I though I would ask any Mac geeks here if they knew anything about viruses or spyware that a Mac could get to cause this to happen.

[Dr. KillGood]

Oh but Mac's are perfect, they do not have spyware.

[bicostp]

Sounds like her laptop is vulnerable to Mac viruses.

All seven of them. (Okay there's a couple hundred, including the 70 or so that came out for it between 1984 and 2002, the years of OS .98 to 9.2)

Are you sure nobody else used it while she wasn't looking? Or maybe she just plain forgot?

[dragonhead]

Are you sure nobody else used it while she wasn't looking? Or maybe she just plain forgot?

[Mikeyman64]

I know she didn't "just forget", but I was just making sure there was no other way before making any assumptions.
Is there a software I can use to find out (antivirus) or is it even worth checking on?

[dragonhead]

I know she didn't "just forget", but I was just making sure there was no other way before making any assumptions.
Is there a software I can use to find out (antivirus) or is it even worth checking on?

really cant think of anything. dont bother with antivirus.

[Bibin]

There are little to no good antivirus apps for Mac as stupid people believe that mac is invulnerable.

It has hardly any viruses because nobody bothers to write them for Mac. Someone wrote a proof-of-concept harmless worm for Mac. OSX by default allows everything incoming through the firewall...