Question

Can i simulate event submit/click on page elements uses chrome plugin?
If plugin mode on. Plugin looking some elements on page and send click event.

Answer 1

Yes, you can do this by creating a custom event from a content script. Try something like this:

function simulateClick(elementId) {
  var evt = document.createEvent('MouseEvents');
  evt.initMouseEvent('click', true, false,  document, 0, 0, 0, 0, 0, false, 
      false, false, false, 0, null);
  document.getElementById(elementId).dispatchEvent(evt);
}

See dispatchEvent docs on MDN for more info.