I was wondering, is there anyway a developer can hide or exclude a certain app permissions from being seen by Android market users? And are the permissions for an app controlled or regulated by Google?.. Another question I have - Is there anyway to restrict PDF files from opening in the default browser?. This is a problem when I am on a search engine and accidently click a link that's a pdf file- I don't want pdf's downloaded without asking me permission atleast. And my last question, is there a way to view current extensions that are installed in the browser.? Where is androids built in file manager? Oh yea, does uninstalling an app completely take off everything related to that app from your phone?