Comment 14 for bug 283095

The reason I used the phrase "Are you sure" is that asking you if you're sure is the sole reason these alerts need to exist, except for the corner case of inviting you to restart instead of logging out. They're there to get confirmation to prevent accidents. (Someday I'd like to figure out how to make accidents similarly difficult using some mechanism that isn't an are-you-sure alert box. ExitStrategy solves this for Shut Down and Restart, but not for Log Out.)

I'd be happy with switching from "restart to install software updates" to "restart to apply software updates" if that's more technically accurate. (It's shorter, too!) But I don't think it's useful to use both "installed" and "take effect" within the message itself. If updates still require a restart to take effect, they haven't been "installed" in the sense most people will understand that word.

I think explicitly confirming or cancelling will be hundreds of times more common than waiting for the timeout, which is why I think the sentence about the timeout shouldn't even use a font as large as the rest of the text, let alone come before the rest of the text.