Bug 1602075 - only highlight the accessibility tab when the auto init feature is not enabled. r=mtigley

Differential Revision: https://phabricator.services.mozilla.com/D71585

devtools/client/accessibility/accessibility-startup.js

@@ -96,6 +96,12 @@ class AccessibilityStartup {
    * accessibility service is initialized or shutdown.
    */
   async _updateToolHighlight() {
+    // Only update the tab highlighted state when the panel can be
+    // enabled/disabled manually.
+    if (this.accessibilityProxy.supports.autoInit) {
+      return;
+    }
+
     const isHighlighted = await this.toolbox.isToolHighlighted("accessibility");
     if (this.accessibilityProxy.enabled && !isHighlighted) {
       this.toolbox.highlightTool("accessibility");