Ouch (Firefox)
3rd party software seems to be the big vector for attacks and Firefox is right at the top of that list. (Page 14)
1. Mozilla Firefox Mozilla Foundation 56% 96 15
2. Apple Safari Apple 15% 84 9
3. Sun Java JRE Sun (Oracle) 89% 70 5
4. Google Chrome Adobe 30% 70 14
5. Adobe Reader Adobe 91% 69 7
6. Adobe Acrobat Adobe 8% 69 7
7. Adobe Flash Player Adobe 99% 51 4
8. Adobe AIR Adobe 41% 51 4
9. Apple iTunes Apple 43% 48 3
10. Mozilla Thunderbird Mozilla Foundation 10% 36 7
Interesting to see that Opera maintains it's track record of great security... (it's clearly considered here, as it's marketshare it pretty much on-par with Safari)
It's also interesting to see that Secunia think Adobe makes Google Chrome...