【Python】install.rdfがないアドオンをSeleniumのFirefoxにインストールする方法

profile.py

import json
import os
import sys

from selenium import webdriver

class FirefoxProfile(webdriver.FirefoxProfile):
  """
  FirefoxProfileの拡張クラス
  """
  
  def _addon_details(self, addon_path):
    """
    install.rdfがない場合、manifest.jsonを探す
    """
    try:
      return super()._addon_details(addon_path)
    except webdriver.firefox.firefox_profile.AddonFormatError:
      try:
        with open(os.path.join(addon_path, 'manifest.json'), 'r', encoding='utf-8_sig') as f:
          manifest = json.load(f)
          return {
            'id': manifest['applications']['gecko']['id'],
            'version': manifest['version'],
            'name': manifest['name'],
            'unpack': False,
          }
      except (IOError, KeyError) as e:
        raise AddonFormatError(str(e), sys.exc_info()[2])

sample.py

from selenium import webdriver
import profile

addon = "extension.xpi"

profile = profile.MyFirefoxProfile()
profile.add_extension(extension=addon)

browser = webdriver.Firefox(profile)
browser.get("https://www.google.co.jp")