When the user installs a native app in Windows, if they don't launch the app, a Profiles folder and a profiles.ini are not created. If they uninstall the app without first launching it, the folder for the app within %APPDATA% will remain and will be empty. We usually leave the folder to keep the Profiles and profile.ini but if the user doesn't launch the app, there is no use for the folder within %APPDATA% anymore. Steps to Reproduce: 1. Launch Firefox - Use FF9 and above 2. Install the apps extension - Tried with openwebapps-0af54cbc1a-12_09_2011.xpi from http://people.mozilla.com/~dclarke/openwebapps/Extension/ 3. Go to apps.mozillalabs.com/appdir 4. Install an app - Choose to install it natively as well 5. Uninstall the native app 6. windows+r and type %APPDATA% Actual Results: The folder for the app remains in %APPDATA% and is empty. Expected Results: The folder should be completely removed if the user never launches the app.

A Pivotal Tracker story has been created for this Bug: http://www.pivotaltracker.com/story/show/24808737

This should be fixed and verified in the mozilla-central implementation.

Note - This bug covers cases when the app has or hasn't been run, then uninstall occurs.

Re-tested on the current nightly build on Win 7 64-bit. Uninstalling an app that has not been launched does wipe the app data entirely. Apps that were launched will leave profile data behind, which is expected. Resolving as works for me.