Software Update: I Don't Want To Restart Now!
Both Firefox and Thunderbird have instituted automatic software update features whereby the browser and email reader periodically check their home sites to download any updates. This is a good thing, in my opinion.
However, both programs has also gotten into the habit of popping up a message box, the moment the download is complete, asking "Hey, new updates are here. You need to restart?" And I can choose either "Now" or "Later."
This is annoying. Just think about it: I've been using the old version of your product for months, and things are just fine. And I start and quit Firefox and Thunderbird all the time, at least several times a day. (With Firefox routinely taking up 200M of memory, and not to mention the AJaX induced CPU load, nowadays, I have to close it down from time to time.) Can the newly downloaded stuff wait quietly for just a few more hours for one of my restarts?
And what if I accidentally clicked on the "Now" button? I'd loose my "place"—all the tabs I have opened, and the form I'm in the middle of filling out will be gone. That'll make me very angry. Enough to write a blog entry bashing your feature.