Update comments

Author: mdmintz

seleniumbase/core/browser_launcher.py

@@ -117,6 +117,7 @@ def _set_chrome_options(
         abs_path = os.path.abspath(user_data_dir)
         chrome_options.add_argument("user-data-dir=%s" % abs_path)
     if extension_zip:
+        # Can be a comma-separated list of .ZIP or .CRX files
         extension_zip_list = extension_zip.split(',')
         for extension_zip_item in extension_zip_list:
             abs_path = os.path.abspath(extension_zip_item)

seleniumbase/plugins/pytest_plugin.py

@@ -125,13 +125,15 @@ def pytest_addoption(parser):
                      dest='extension_zip',
                      default=None,
                      help="""Designates the Chrome Extension ZIP file to load.
-                          Format: A .zip file containing the Chrome extension.
+                          Format: A comma-separated list of .zip or .crx files
+                          containing the Chrome extensions to load.
                           Default: None.""")
     parser.addoption('--extension_dir', action='store',
                      dest='extension_dir',
                      default=None,
                      help="""Designates the Chrome Extension folder to load.
                           Format: A directory containing the Chrome extension.
+                          (Can also be a comma-separated list of directories.)
                           Default: None.""")
     parser.addoption('--headless', action="store_true",
                      dest='headless',

seleniumbase/plugins/selenium_plugin.py

@@ -100,14 +100,16 @@ def options(self, parser, env):
             dest='extension_zip',
             default=None,
             help="""Designates the Chrome Extension ZIP file to load.
-                    Format: A .zip file containing the Chrome extension.
+                    Format: A comma-separated list of .zip or .crx files
+                    containing the Chrome extensions to load.
                     Default: None.""")
         parser.add_option(
             '--extension_dir', action='store',
             dest='extension_dir',
             default=None,
             help="""Designates the Chrome Extension folder to load.
                     Format: A directory containing the Chrome extension.
+                    (Can also be a comma-separated list of directories.)
                     Default: None.""")
         parser.add_option(
             '--headless', action="store_true",