rem: var prefmigrator = Components.classes['component: 
add: var prefmigrator = Components.classes['@mozilla.org/profile/migration;1'].createInstance(Components.interfaces.nsIPrefMigration); 
context: function onLoad(oldProfilePath, newProfilePath) {  //dialog = new Object;  //dialog.title     = document.getElementByID( "xpi.process" );  //dialog.current   = document.getElementByID( "xpi.currentlyprocessing");  //dialog.newWindow   = document.getElementById( "dialog.newWindow" );	  dump("start of pref migration\n");  var prefmigrator = Components.classes['component://netscape/profile/migration'].createInstance(Components.interfaces.nsIPrefMigration);  if (prefmigrator)   {	try {    	prefmigrator.ProcessPrefsFromJS();    }    catch (ex) {		dump("failed to migrate: ex="+ ex + "\n");	}  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/6cc70ebd6c97bd0b2fe48c31f579e855387ced9d/profileMigrationProgress.js/clean/profile/pref-migrator/resources/content/profileMigrationProgress.js