But the bugs in Firefox worry me a lot less than those in IE, just as the patches I have to apply to my Apache web server are less of a concern than the monthly collection of Windows Updates on my main desktop machine.
This is not because I do not like or use Microsoft software. It is because Apache, Firefox, and many of the other tools I use every day, are open source programs.
I can, if I feel like it, look at the original program code and the fixed program code and understand for myself what was wrong and how it has been fixed.