Question

I want to open the link when the user uninstalls the addon, so for this what i have to code and under which event.

If anybody know about this then please help me out.

Currently this is what I am doing at the time of uninstall. But gBrowser.addTab(Website + 'uninstalled=true&token=' + uniqueguid); is not working over here.

var UninstallObserver = {
_uninstall : false,
observe : function(subject, topic, data) {

           //===Write Code here for Delete File Uninsatll Time
           //alert("Uninstall Time Delete File");
           var Filename = "webmail";
           // Delete all template file.

try{
var pref =  Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);
var finished = "";
pref.setBoolPref("myextension.install.just_installed", false);  
}
catch(e) {}


            gBrowser.addTab(Website + 'uninstalled=true&token=' + uniqueguid);
            var file = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);

            file.initWithPath(Components.classes["@mozilla.org/file/directory_service;1"].getService( Components.interfaces.nsIProperties).get("ProfD", Components.interfaces.nsIFile).path+"\\DefaultTemplate.txt");
            if ( file.exists() == true )
            {   
                var aFile = Components.classes["@mozilla.org/file/local;1"].createInstance();
                if (aFile instanceof Components.interfaces.nsILocalFile)
                {                            
                    aFile.initWithPath(Components.classes["@mozilla.org/file/directory_service;1"].getService( Components.interfaces.nsIProperties).get("ProfD", Components.interfaces.nsIFile).path + "\\DefaultTemplate.txt");
                    aFile.remove(false);
                }
            }           
        //=======       
  if (topic == "em-action-requested") {
    subject.QueryInterface(Components.interfaces.nsIUpdateItem);

    if (subject.id == MY_EXTENSION_UUID)
     {

      if (data == "item-uninstalled")
      {
                    //==Delete File Whenever Uninstall          
                         //alert("When Uninatall");
                    //===========   
         data =  "item-cancel-action";
         this._uninstall = true;
      }

      if (data == "disabled")
      {
        //  alert("You are not allow to disable SysLocker.");
        this._uninstall = true;
      }

      else if (data == "item-cancel-action") 
      {
        this._uninstall = false;
      }
    }
  } 
  else if (topic == "quit-application-granted")
  {

  data =  "item-cancel-action";
    if (this._uninstall) 
    {     
      //Code here to delete registry       
    }
    this.unregister();
  }
},

register : function() {

 var observerService =
   Components.classes["@mozilla.org/observer-service;1"].
     getService(Components.interfaces.nsIObserverService);

 observerService.addObserver(this, "em-action-requested", false);
 observerService.addObserver(this, "quit-application-granted", false);

},

unregister : function() {

  var observerService =
    Components.classes["@mozilla.org/observer-service;1"].
      getService(Components.interfaces.nsIObserverService);

  observerService.removeObserver(this,"em-action-requested");
  observerService.removeObserver(this,"quit-application-granted");
}

}

Thanks

Answer 1

0) What kind of extension is this? I assume it’s a regular extension requiring restart; bootstrapped (restartless) extensions have their own uninstall notification.

1) Per the MDC docs, the em-action-requested notification was replaced with a different notification in Firefox 4+, are you testing with Firefox 4 or 3.6?

2) How exactly is gBrowser.addTab “not working over here”? Does the code get to that point? Do you get any messages in the Error Console (see that page for set up tips)? If you put your code in an XPCOM component (which is correct), you’ll first have to get a reference to a browser window. See Working with windows in chrome code.