diff -r 000000000000 -r 6474c204b198 browser/devtools/inspector/inspector.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/inspector/inspector.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#inspector-sidebar {
+  min-width: 250px;
+}
+
+#searchbox-panel-listbox {
+  width: 250px;
+  max-width: 250px;
+  overflow-x: hidden;
+}
+
+#searchbox-panel-listbox > richlistitem,
+#searchbox-panel-listbox > richlistitem[selected] {
+  overflow-x: hidden;
+}
+
+#searchbox-panel-listbox > richlistitem > .initial-value {
+  max-width: 130px;
+  margin-left: 15px;
+}
+
+#searchbox-panel-listbox > richlistitem > .autocomplete-value {
+  max-width: 150px;
+}