When you call ExecFile in Fullscreenmode, the Blitz App will be paused until it will regain focus, eg. by a mouseclick.
That'd be great, but on the three PCs I've tried it on, on returning to the Blitz app it's frozen and never comes back.
The easiest solution may be to :
-switch to windowed mode
-minimize window
-run browser
-switch to windowed mode
-minimize window
-run browser
I tried that on a couple of my less tech-savvy friends. Two downsides were:
- They both though the game had closed down (when it was actually minimised) and tried running it again to get back to it (actually, maybe shutting down the game and launching the URL might work okay ... hmm ...)
- It's seems "rude" to switch to a screen mode that isn't the one the player has chosen.