Use tab_domain when comparing tabs

issue10441
review381241002
(grafted from 287382c0d95e03d280b2353b7d098b634ead68f1)

--HG--
branch : 6.0

src/tab.js

@@ -754,7 +754,9 @@
                     JSON.stringify(attributes.context)) &&
                 (compare(
                     this.attributes.search_value || [],
-                    attributes.search_value || []))
+                    attributes.search_value || [])) &&
+                (JSON.stringify(this.screen.attributes.tab_domain) ===
+                    JSON.stringify(attributes.tab_domain))
             );
         },
         _close_allowed: function() {