Currently, in the final step of a Firefox update, the last dialog box says, "Restart to update Firefox." The phrasing makes it confusing... People think, "I don't want to restart Windows. It takes too long. I'll do this later." INSTEAD, the message should say, "Restart Firefox to update." That way, no one will think a Windows restart is necessary. (Same goes for Thunderbird, which should say, "Restart Thunderbird to update.")
Remember, it's the little things that define greatness. This suggestion comes from someone who has done a fair amount of programming in the old days, and spent decades as a professional copywriter in advertising. Be precise in your program messaging.
And thanks for your great programs!