tl;dr: Android M replaces the "Permissions dialog" on app installation with runtime dialogs displayed when a sensitive permission (Camera, Microphone, personal

tl;dr: Android M replaces the "Permissions dialog" on app installation with runtime dialogs displayed when a sensitive permission (Camera, Microphone, personal data) is actually required by an app. This is a step into the right direction, regarding user privacy. However, it is only enabled for applications that target the new API level M, and applications need to explicitly implement the query/request permission feature. I wish they would have enabled it for all apps by default - after all they have implemented anything necessary in the OS, they just made it a well-hidden opt-in feature: Note: On devices running the M Developer Preview, a user can turn off permissions for any app (including legacy apps) from the app's Settings screen. If a user turns off permissions for a legacy app, the system silently disables the appropriate functionality.