--- a/browser/devtools/shared/timeline/waterfall.js
+++ b/browser/devtools/shared/timeline/waterfall.js
@@ -17,17 +17,17 @@ loader.lazyImporter(this, "setNamedTimeo
   "resource:///modules/devtools/ViewHelpers.jsm");
 loader.lazyImporter(this, "clearNamedTimeout",
   "resource:///modules/devtools/ViewHelpers.jsm");
 loader.lazyRequireGetter(this, "EventEmitter",
   "devtools/toolkit/event-emitter");
 
 const HTML_NS = "http://www.w3.org/1999/xhtml";
 
-const WATERFALL_SIDEBAR_WIDTH = 150; // px
+const WATERFALL_SIDEBAR_WIDTH = 200; // px
 
 const WATERFALL_IMMEDIATE_DRAW_MARKERS_COUNT = 30;
 const WATERFALL_FLUSH_OUTSTANDING_MARKERS_DELAY = 75; // ms
 
 const FIND_OPTIMAL_TICK_INTERVAL_MAX_ITERS = 100;
 const WATERFALL_HEADER_TICKS_MULTIPLE = 5; // ms
 const WATERFALL_HEADER_TICKS_SPACING_MIN = 50; // px
 const WATERFALL_HEADER_TEXT_PADDING = 3; // px