Continuing off-topic -- I hate programs that think updating is more important than whatever I had in mind when I launched the program. I prefer programs that update/download in the background while I get stuff done then let me update at my leisure when they've finished downloading.
I was just thinking the same thing - why doesa Firefox insisted on installing updates just when I open it to use it (which really is exactly when I don't want it to be doing it). Why not do the updates when I close it down?
The potential for data/program corruption is much higher when it is closing down (think of what happens when the computer shuts down, or when the program is closed immediately followed by a shutdown. )
For programs that are permanently online, it is a good idea to have updating as a high preference. At least when your operating system is not doing the updating off all installed software automatically.