Open tab should show the hidden tabs first

index.js

@@ -624,7 +624,7 @@ const ContainerService = {
       const source = ("source" in args) ? args.source : null;
 
       // Only send telemetry for tabs opened by UI - i.e., not via showTabs
-      if (source) {
+      if (source && userContextId) {
         this.sendTelemetryPayload({
           "event": "open-tab",
           "eventSource": source,
@@ -633,10 +633,19 @@ const ContainerService = {
         });
       }
 
-      const tab = browserWin.gBrowser.addTab(args.url || DEFAULT_TAB, { userContextId });
-      browserWin.gBrowser.selectedTab = tab;
-      browserWin.focusAndSelectUrlBar();
-      return true;
+      let promise;
+      if (userContextId) {
+        promise = this.showTabs(args);
+      } else {
+        promise = Promise.resolve(null);
+      }
+
+      return promise.then(() => {
+        const tab = browserWin.gBrowser.addTab(args.url || DEFAULT_TAB, { userContextId });
+        browserWin.gBrowser.selectedTab = tab;
+        browserWin.focusAndSelectUrlBar();
+        return true;
+      });
     }).catch(() => false);
   },
 

webextension/js/popup.js

@@ -247,14 +247,9 @@ Logic.registerPanel(P_CONTAINERS_LIST, {
       tr.addEventListener("click", e => {
         if (e.target.matches(".open-newtab")) {
           browser.runtime.sendMessage({
-            method: "showTabs",
-            userContextId: identity.userContextId
-          }).then(() => {
-            return browser.runtime.sendMessage({
-              method: "openTab",
-              userContextId: identity.userContextId,
-              source: "pop-up"
-            });
+            method: "openTab",
+            userContextId: identity.userContextId,
+            source: "pop-up"
           }).then(() => {
             window.close();
           }).catch(() => {