Clean up Firefox WebDriver constructor

Author: davehunt

py/selenium/webdriver/firefox/webdriver.py

@@ -47,38 +47,22 @@ class WebDriver(RemoteWebDriver):
 
     def __init__(self, firefox_profile=None, firefox_binary=None, timeout=30,
                  capabilities=None, proxy=None, executable_path="wires", firefox_options=None):
-        self.profile = firefox_profile
-        self.binary = firefox_binary
-        if firefox_options is None:
+        capabilities = capabilities or DesiredCapabilities.FIREFOX.copy()
 
-            if self.profile is None:
-                self.profile = FirefoxProfile()
+        self.profile = firefox_profile or FirefoxProfile()
+        self.profile.native_events_enabled = (
+            self.NATIVE_EVENTS_ALLOWED and self.profile.native_events_enabled)
 
-            self.profile.native_events_enabled = (
-                self.NATIVE_EVENTS_ALLOWED and self.profile.native_events_enabled)
+        self.binary = firefox_binary or capabilities.get("binary", FirefoxBinary())
 
-            if capabilities is None:
-                capabilities = DesiredCapabilities.FIREFOX
-
-            if self.binary is None:
-                self.binary = capabilities.get("binary") or FirefoxBinary()
-
-            firefox_options = Options()
-            firefox_options.binary_location = self.binary if isinstance(self.binary, basestring) else self.binary._get_firefox_start_cmd()
-            firefox_options.profile = self.profile
-
-        if capabilities is None:
-            capabilities = firefox_options.to_capabilities()
-        else:
-            capabilities.update(firefox_options.to_capabilities())
+        self.options = firefox_options or Options()
+        self.options.binary_location = self.binary if isinstance(self.binary, basestring) else self.binary._get_firefox_start_cmd()
+        self.options.profile = self.profile
+        capabilities.update(self.options.to_capabilities())
 
         # marionette
         if capabilities.get("marionette"):
-            self.binary = firefox_options.binary_location
-            if isinstance(firefox_options.binary_location, FirefoxBinary):
-                self.binary = firefox_options.binary_location._get_firefox_start_cmd()
-
-            self.service = Service(executable_path, firefox_binary=self.binary)
+            self.service = Service(executable_path, firefox_binary=self.options.binary_location)
             self.service.start()
 
             executor = FirefoxRemoteConnection(
@@ -93,12 +77,6 @@ def __init__(self, firefox_profile=None, firefox_binary=None, timeout=30,
             if proxy is not None:
                 proxy.add_to_capabilities(capabilities)
 
-            if self.binary is None:
-                self.binary = firefox_options.binary_location or FirefoxBinary()
-
-            if self.profile is None:
-                self.profile = firefox_options.profile or FirefoxProfile()
-
             executor = ExtensionConnection("127.0.0.1", self.profile,
                                            self.binary, timeout)
             RemoteWebDriver.__init__(self,