in pages/desktop/base.py [0:0]
def register(self):
fxa_register_page = self.header.click_login()
self.wait.until(EC.visibility_of_element_located((By.NAME, "email")))
fxa_register_page.fxa_register()
# wait for transition between FxA page and AMO
self.wait.until(EC.url_contains("addons"))
self.wait.until(lambda _: self.logged_in)