Minimizing a DB application is never a good idea. It flushes video memory, meaning that you'll need to reload all you images/textures. Often even after doing so, you'll still get a terrible sync flicker or an altogether malfunctioning sync. It also usually kills loaded sound and music. Unfortunately again, Screen Invalid doesn't always catch an invalid screen.
Honestly, if you just want to load up a web page, I'd just write a custom HTML viewer in DB. Or even easier, make your page into a big JPG and paste it to the screen.