cowculator I've used lucky patcher (which I believe I found somewhere on these forums) to remove permissions. For example if you can access an in app browser through clicking on "help center" in an app, sometimes you can remove the permission to click on "help center" for that app, in lucky patcher. Many times you won't have that option, or even if you do, the app might not work afterwards. This only works occasionally, but I guess it's better than nothing.
