While you can edit the properties in object browser, those edits will not persist. Sorry. :(
Ok. No problem. Out of curiosity, what is the purpose of being able to edit the object properties?
"What if...?"
It's a means of testing things. You can edit certain properties of components in code or manually with the general goal of seeing "If the property of this object is THIS, I expect THAT to happen". It's a bit of a lower-level manipulation of the application under test. I personally don't do this but the possibility is there.
