Addon SDK - context-menu and page-mod workers

Question

I have been working on a context-menu that communicates with a page mod and come up against an issue.

I am able to send a communication with right click to the page

Answer 1

ZERO is right, the event detach is emitted on reload.
But when I open a different page in the same tab no detach-event is been emitted!
So, i.e., when I have loaded some page A in tab 1 and click on a link which opens a different page B in the same tab 1 I have to detach the worker for page A manually(?)

var workers = [];    

require('page-mod').PageMod({
  include: '*',
  contentScriptWhen: 'end',
  contentScript: [require('self').data.url('bla.js')],
  onAttach: function(worker) {
    var w = workers.length;
    while (w--) {
      if (worker.tab === workers[w].tab) {
        workers.splice(w, 1);
        break;
      }
    }
    workers.push(worker);
    // other stuff
  }
});