diff --git a/qutebrowser/config/websettings.py b/qutebrowser/config/websettings.py
index c94b98a1b..a90615d0c 100644
--- a/qutebrowser/config/websettings.py
+++ b/qutebrowser/config/websettings.py
@@ -24,6 +24,8 @@ Module attributes:
     settings: The global QWebSettings singleton instance.
 """
 
+# pylint: disable=unnecessary-lambda
+
 from PyQt5.QtCore import pyqtSlot
 from PyQt5.QtWebKit import QWebSettings
 
@@ -98,6 +100,7 @@ STATIC_SETTERS = {
         lambda v: QWebSettings.setOfflineWebApplicationCacheQuota(v),
 }
 
+
 settings = None
 
 
@@ -126,7 +129,6 @@ def init(cachedir):
 def on_config_changed(section, option):
     """Update global settings when qwebsettings changed."""
     if section == 'webkit':
-        settings = QWebSettings.globalSettings()
         value = config.get(section, option)
         if option in ATTRIBUTES:
             settings.setAttribute(ATTRIBUTES[option], value)
diff --git a/qutebrowser/utils/url.py b/qutebrowser/utils/url.py
index 9fae90094..8edd7d2ab 100644
--- a/qutebrowser/utils/url.py
+++ b/qutebrowser/utils/url.py
@@ -134,7 +134,6 @@ def fuzzy_url(url):
     Return:
         A target QUrl to a searchpage or the original URL.
     """
-    u = qurl(url)
     urlstr = urlstring(url)
     if is_url(urlstr):
         # probably an address
diff --git a/qutebrowser/widgets/_tabbedbrowser.py b/qutebrowser/widgets/_tabbedbrowser.py
index e32928e65..b797c3328 100644
--- a/qutebrowser/widgets/_tabbedbrowser.py
+++ b/qutebrowser/widgets/_tabbedbrowser.py
@@ -326,18 +326,23 @@ class TabbedBrowser(TabWidget):
         self.paste(sel, True)
 
     @cmdutils.register(instance='mainwindow.tabs')
-    def focus_tab(self, arg=None, count=None):
-        if ((arg is None and count is None) or
-                (arg is not None and count is not None)):
+    def focus_tab(self, idx=None, count=None):
+        """Focus the tab given as argument or in count.
+
+        Args:
+            idx: The tab index to focus, starting with 1.
+        """
+        if ((idx is None and count is None) or
+                (idx is not None and count is not None)):
             message.error("Either argument or count must be given!")
             return
         try:
-            idx = int(arg) if arg is not None else count
+            i = int(idx) if idx is not None else count
         except ValueError:
-            message.error("Invalid argument: {}".format(arg))
+            message.error("Invalid argument: {}".format(idx))
             return
-        if 1 <= idx <= self.count():
-            self.setCurrentIndex(idx - 1)
+        if 1 <= i <= self.count():
+            self.setCurrentIndex(i - 1)
         else:
             message.error("Index out of bounds!")
             return