Firefox add-on sdk uninstall hook

Question

I keep some user data in simple-storage. When the user uninstalls the add-on I want to remove this user data. Is there some event or something similar?

Answer 1

This will work in every file:

require("sdk/system/unload").when(function(reason) {
  if (reason == "uninstall") {
    // do uninstall stuff..
  }
});

Answer 2

Try this:

exports.onUnload = function(reason) {
   //do stuff for unload here
}