To remove the front bumper:

Remove the screws that hold it to the radiator support.

Unscrew the bolts that attach the fender to the bumper on the inside of the fender.

On the inside of the engine bay there is a bolt on each side where the bumper lines up with the fender.

Detach the fenderwells from the bumper underneath the bumper.

Then pull the bumper straight forward and it should come off, if it resists then you missed something.