Looks like some trouble in `browserid` module:
`self = <browserid.pages.sign_in.SignIn object at 0x10e2dd910>, expect = 'remember'
 
    def click_sign_in_returning_user(self, expect='login'):
        """Clicks the 'sign in' button."""
        self.selenium.find_element(
            *self._sign_in_returning_user_locator).click()
 
        if expect == 'login':
            self.switch_to_main_window()
        elif expect == 'remember':
            WebDriverWait(self.selenium, self.timeout).until(
               lambda s: s.find_element(
                    *self._your_computer_content_locator).is_displayed())
browserid/pages/sign_in.py:187:`

It hangs in lambda