Haketilo

import re

from selenium.webdriver.support.ui import WebDriverWait

from selenium.common.exceptions import NoSuchElementException

extract_base_url_re = re.compile(r'^(.*)manifest.json$')

def get_extension_base_url(driver):

    """

    Extension's internall UUID is not directly exposed in Selenium. Instead, we

    can navigate to about:debugging and inspect the manifest URL present there

    to get the base url like:

        moz-extension://b225c78f-d108-4caa-8406-f38b37d8dee5/

    which can then be used to navigate to extension-bundled pages.

    """

    driver.implicitly_wait(10)

    try:

        # For newer Firefoxes

        driver.get('about:debugging#/runtime/this-firefox')

        manifest_link = driver.find_element_by_class_name('qa-manifest-url')

    except NoSuchElementException:

        driver.get("about:debugging#addons")

        manifest_link = driver.find_element_by_class_name('manifest-url')

    driver.implicitly_wait(0)

    manifest_url = manifest_link.get_attribute('href')

    return extract_base_url_re.match(manifest_url).group(1)