--- a/devtools/client/themes/inspector.css
+++ b/devtools/client/themes/inspector.css
@@ -46,17 +46,18 @@ window {
 #inspector-splitter-box {
   height: 100vh;
   width: 100vw;
   position: fixed;
 }
 
 /* Minimum width for the Inspector main (uncontrolled) area. */
 #inspector-splitter-box .uncontrolled {
-  min-width: 275px;
+  min-height: 50px;
+  min-width: 50px;
 }
 
 #inspector-splitter-box .controlled.pane-collapsed {
   visibility: collapse;
 }
 
 /* Use flex layout for the Inspector toolbar. For now, it's done
    specifically for the Inspector toolbar since general rule applied