diff --git a/brozzler/chrome.py b/brozzler/chrome.py
index 935a9ca..874b40d 100644
--- a/brozzler/chrome.py
+++ b/brozzler/chrome.py
@@ -136,14 +136,16 @@ class Chrome:
             self._home_tmpdir.name, 'chrome-user-data')
         if cookie_db:
             self._init_cookie_db(cookie_db)
+        self._shutdown.clear()
 
         new_env = os.environ.copy()
         new_env['HOME'] = self._home_tmpdir.name
         self.port = self._find_available_port(self.port)
         chrome_args = [
-                self.chrome_exe, '--use-mock-keychain', # mac thing
-                '--user-data-dir=%s' % self._chrome_user_data_dir,
+                self.chrome_exe,
                 '--remote-debugging-port=%s' % self.port,
+                '--use-mock-keychain', # mac thing
+                '--user-data-dir=%s' % self._chrome_user_data_dir,
                 '--disable-web-sockets', '--disable-cache',
                 '--window-size=1100,900', '--no-default-browser-check',
                 '--disable-first-run-ui', '--no-first-run',
diff --git a/setup.py b/setup.py
index 2bbb018..21b5113 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ def find_package_data(package):
 
 setuptools.setup(
         name='brozzler',
-        version='1.1b9.dev158',
+        version='1.1b9.dev159',
         description='Distributed web crawling with browsers',
         url='https://github.com/internetarchive/brozzler',
         author='Noah Levitt',