1 files changed, 35 insertions, 0 deletions
diff --git a/browser/base/content/test/zoom/browser_sitespecific_background_pref.js b/browser/base/content/test/zoom/browser_sitespecific_background_pref.js
new file mode 100644
index 0000000000..5756c4d8d3
--- /dev/null
+++ b/browser/base/content/test/zoom/browser_sitespecific_background_pref.js
@@ -0,0 +1,35 @@
+function test() {
+  waitForExplicitFinish();
+
+  (async function () {
+    let testPage =
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      "http://example.org/browser/browser/base/content/test/zoom/zoom_test.html";
+    let tab1 = BrowserTestUtils.addTab(gBrowser);
+    await FullZoomHelper.selectTabAndWaitForLocationChange(tab1);
+    await FullZoomHelper.load(tab1, testPage);
+
+    let tab2 = BrowserTestUtils.addTab(gBrowser);
+    await FullZoomHelper.load(tab2, testPage);
+
+    await FullZoom.enlarge();
+    let tab1Zoom = ZoomManager.getZoomForBrowser(tab1.linkedBrowser);
+
+    await FullZoomHelper.selectTabAndWaitForLocationChange(tab2);
+    let tab2Zoom = ZoomManager.getZoomForBrowser(tab2.linkedBrowser);
+    is(tab2Zoom, tab1Zoom, "Zoom should affect background tabs");
+
+    Services.prefs.setBoolPref("browser.zoom.updateBackgroundTabs", false);
+    await FullZoom.reset();
+    gBrowser.selectedTab = tab1;
+    tab1Zoom = ZoomManager.getZoomForBrowser(tab1.linkedBrowser);
+    tab2Zoom = ZoomManager.getZoomForBrowser(tab2.linkedBrowser);
+    isnot(tab1Zoom, tab2Zoom, "Zoom should not affect background tabs");
+
+    if (Services.prefs.prefHasUserValue("browser.zoom.updateBackgroundTabs")) {
+      Services.prefs.clearUserPref("browser.zoom.updateBackgroundTabs");
+    }
+    await FullZoomHelper.removeTabAndWaitForLocationChange(tab1);
+    await FullZoomHelper.removeTabAndWaitForLocationChange(tab2);
+  })().then(finish, FullZoomHelper.failAndContinue(finish));
+}