There are all not worth much at all. Possibly DirectDat might be worth a little
*IF* "Dat" is an actual thing that I'm not aware of (aside from the old Data tapes).
Be careful about FoxBrowser .. it's going to be a Trademark problem with the FireFox browser.
You can't really ask how to flip domains here. It is something you learn after reading dozens if not hundreds of discussions in these forums. Definitely do some reading and learning before getting any more domains similar to the ones you've listed above.
Good luck moving forward!