Bug 1486050 - Don't change selected tab when browser.tabs.update is called with {highlighted: true, active: false}. r=mixedpuppy

Differential Revision: https://phabricator.services.mozilla.com/D4272

--HG--
extra : moz-landing-system : lando

browser/components/extensions/parent/ext-tabs.js

@@ -712,9 +712,12 @@ this.tabs = class extends ExtensionAPI {
             if (updateProperties.highlighted) {
               if (!nativeTab.selected && !nativeTab.multiselected) {
                 tabbrowser.addToMultiSelectedTabs(nativeTab, false);
-                // Select the highlighted tab, this matches Chrome's behavior.
-                tabbrowser.lockClearMultiSelectionOnce();
-                tabbrowser.selectedTab = nativeTab;
+                // Select the highlighted tab unless active:false is provided.
+                // Note that Chrome selects it even in that case.
+                if (updateProperties.active !== false) {
+                  tabbrowser.lockClearMultiSelectionOnce();
+                  tabbrowser.selectedTab = nativeTab;
+                }
               }
             } else {
               tabbrowser.removeFromMultiSelectedTabs(nativeTab, true);

browser/components/extensions/test/browser/browser_ext_tabs_update_highlighted.js

@@ -115,25 +115,24 @@ add_task(async function test_update_highlighted() {
 
       await expectResults(async () => {
         await browser.tabs.update(tab2, {highlighted: true, active: false});
-        return {active: tab2, highlighted: [tab1, tab2], events: [
-          ["onActivated", {tabId: tab2, windowId}],
+        return {active: tab1, highlighted: [tab1, tab2], events: [
           ["onHighlighted", {tabIds: [tab1, tab2], windowId}],
         ]};
-      }, "highlighting and (not really) inactivating non-highlighted tab");
+      }, "highlighting without activating non-highlighted tab");
 
       await expectResults(async () => {
-        await browser.tabs.update(tab1, {highlighted: true, active: true});
-        return {active: tab1, highlighted: [tab1], events: [
-          ["onActivated", {tabId: tab1, windowId}],
-          ["onHighlighted", {tabIds: [tab1], windowId}],
+        await browser.tabs.update(tab2, {highlighted: true, active: true});
+        return {active: tab2, highlighted: [tab2], events: [
+          ["onActivated", {tabId: tab2, windowId}],
+          ["onHighlighted", {tabIds: [tab2], windowId}],
         ]};
       }, "highlighting and activating inactive highlighted tab");
 
       await expectResults(async () => {
-        await browser.tabs.update(tab2, {active: true, highlighted: true});
-        return {active: tab2, highlighted: [tab2], events: [
-          ["onActivated", {tabId: tab2, windowId}],
-          ["onHighlighted", {tabIds: [tab2], windowId}],
+        await browser.tabs.update(tab1, {active: true, highlighted: true});
+        return {active: tab1, highlighted: [tab1], events: [
+          ["onActivated", {tabId: tab1, windowId}],
+          ["onHighlighted", {tabIds: [tab1], windowId}],
         ]};
       }, "highlighting and activating non-highlighted tab");