diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index 94f66ba93ed0..f69a01bb79d1 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -1176,7 +1176,7 @@ pref("devtools.profiler.ui.show-platform-data", false);
 pref("devtools.netmonitor.enabled", true);
 
 // The default Network Monitor UI settings
-pref("devtools.netmonitor.panes-network-details-width", 450);
+pref("devtools.netmonitor.panes-network-details-width", 550);
 pref("devtools.netmonitor.panes-network-details-height", 450);
 pref("devtools.netmonitor.statistics", true);
 pref("devtools.netmonitor.filters", "[\"all\"]");