gistfile1.txt

def _view_page_source_cb(self, button):
        browser = self._activity._tabbed_view.props.current_browser


        text = browser.get_main_frame().get_data_source().get_data()
        print type(text.str)

        browser = self._activity._tabbed_view.add_tab(next_to_current=True)
        browser.load_uri('about:blank')

        text_script = "document.write('" + text.str + "');"

        browser.execute_script(text_script)

        browser.grab_focus()