.keysnailrc config to create "M-x bookmark-with-org" which uses org-protocol to org-capture the URL, title and selection in the browser.

.keysnailrc#bookmark-with-org

ext.add("bookmark-with-org",
	function (aEvent, aArg) {
	  var od = window.content.document;
          window.loadURI('org-protocol://capture://n/'+encodeURIComponent(od.location.href)+'/'+encodeURIComponent(od.title)+'/'+encodeURIComponent(window.getSelection()));
}, M({en: "Save bookmark in Emacs org-mode using org-protocol"}));

key.setGlobalKey(['C-x', 'r', 'm'], function (aEvent) {
  ext.exec("bookmark-with-org", aEvent);
}, 'Bookmark in Emacs org-mode', true);