I was previewing a movie offline in Flash Player 6 and I clicked a link to a .jpg file stored in the same folder as the swf. At this point no browser was open.

Firefox 1.06 (my default browser) opened, with two tabs: one blank (active) and one behind it with http://www.howstuffworks.com/ in it.

It always works- if Firefox isn't already running when the links is clicked. Once it is running, links work as normal.

Has anyone else seen anything like this? Can't find anything on the Net about it. Weirdest thing I've ever seen Firefox do.