Basically, what they wanted to do was to build a background process that detects when you're away from the PC and then pops up the message, so it's the first thing you see what you get back.
Unfortunately (or maybe not) the detection logic had a bug, which caused the message to pop up right away sometimes, spoiling the whole thing.
Really hate Firefox doing this kind of thing. It's supposed to be a browser that cares about the user.