Frosted Glass Shower Doors

I want to cover a large crack in the already frosted / textured glass shower door.

Krylon or another brand?

I do not think it will cover up the crack. For security reasons, you must buy a new shower door. Another solution is to check Freecycle in your area.

Replace the glass. Safety First!

id replace it. hot water will probably crack eventually, so it can get it right. Be careful, can not imagine anything worse than stepping into a bathtub full of glass

Probably not ...
For a quick solution, but no guarantee on how long it will help keep the glass from shattering .... to many pharmacies and sundry shops do a self-adhesive "film frosted window ... sometimes in the same region as the stick on shelfpaper.
I know / I Know ... .. a bit sticky:)

It can hide a bit, but the paint build up in the crack, it will always be visible. Furthermore, crack makes the shower is not watertight addition, there will be some accumulation of mold serious happens. I think the door just need to be replaced.