--- a/devtools/client/themes/performance.css
+++ b/devtools/client/themes/performance.css
@@ -23,16 +23,25 @@
 /*
  * DE-XUL: Set a sidebar width because inline XUL components will cause the flex
  * to overflow if dynamically sized.
  */
 .performance-tool {
   --sidebar-width: 185px;
 }
 
+/* Let the component gain focus when a click hits an empty area */
+.performance-tool {
+  -moz-user-focus: normal;
+}
+
+.performance-tool:focus {
+  outline: 0;
+}
+
 /**
  * A generic class to hide elements, replacing the `element.hidden` attribute
  * that we use to hide elements that can later be active
  */
 .hidden {
   display: none;
   width: 0px;
   height: 0px;

--- a/devtools/client/themes/storage.css
+++ b/devtools/client/themes/storage.css
@@ -9,16 +9,34 @@
   max-width: 500px;
   overflow: auto;
 }
 
 #storage-tree {
   background: var(--theme-sidebar-background);
 }
 
+/* Let the component gain focus when a click hits an empty area */
+#storage-tree {
+  -moz-user-focus: normal;
+}
+
+#storage-tree:focus {
+  outline: 0;
+}
+
+/* Let the component gain focus when a click hits an empty area */
+#storage-table {
+  -moz-user-focus: normal;
+}
+
+#storage-table:focus {
+  outline: 0;
+}
+
 /* The minimum column width needs to be determined by the header width */
 .table-widget-cell {
   min-width: unset;
 }
 
 /* Set minimum column widths */
 #name {
   min-width: 65px;

--- a/devtools/client/themes/toolbox.css
+++ b/devtools/client/themes/toolbox.css
@@ -387,16 +387,25 @@
 /**
  * Enrure that selected toolbox panel's contents are keyboard accessible as they
  * are explicitly made not to be when hidden (default).
  */
 .toolbox-panel[selected] * {
   -moz-user-focus: normal;
 }
 
+/* Let the component gain focus when a click hits an empty area */
+#toolbox-container {
+  -moz-user-focus: normal;
+}
+
+#toolbox-container:focus {
+  outline: 0;
+}
+
 /* Toolbox tabs reordering */
 #toolbox-container.tabs-reordering > .theme-body {
   pointer-events: none;
 }
 
 #toolbox-container.tabs-reordering
   .devtools-tab:not(.selected):hover
   .devtools-tab-line {