1 files changed, 52 insertions, 0 deletions
diff --git a/browser/components/preferences/tests/browser_performance_content_process_limit.js b/browser/components/preferences/tests/browser_performance_content_process_limit.js
new file mode 100644
index 0000000000..7ac5c354bd
--- /dev/null
+++ b/browser/components/preferences/tests/browser_performance_content_process_limit.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.preferences.defaultPerformanceSettings.enabled", false]],
+  });
+
+  let prefs = await openPreferencesViaOpenPreferencesAPI("paneGeneral", {
+    leaveOpen: true,
+  });
+  is(prefs.selectedPane, "paneGeneral", "General pane was selected");
+
+  let doc = gBrowser.contentDocument;
+
+  let limitContentProcess = doc.querySelector("#limitContentProcess");
+  is(
+    limitContentProcess.hidden,
+    Services.appinfo.fissionAutostart,
+    "Limit Content Process should be hidden if fission is enabled and shown if it is not."
+  );
+
+  let contentProcessCount = doc.querySelector("#contentProcessCount");
+  is(
+    contentProcessCount.hidden,
+    Services.appinfo.fissionAutostart,
+    "Limit Content Count should be hidden if fission is enabled and shown if it is not."
+  );
+
+  let contentProcessCountEnabledDescription = doc.querySelector(
+    "#contentProcessCountEnabledDescription"
+  );
+  is(
+    contentProcessCountEnabledDescription.hidden,
+    Services.appinfo.fissionAutostart,
+    "Limit Content Process Enabled Description should be hidden if fission is enabled and shown if it is not."
+  );
+
+  let contentProcessCountDisabledDescription = doc.querySelector(
+    "#contentProcessCountDisabledDescription"
+  );
+  is(
+    contentProcessCountDisabledDescription.hidden,
+    Services.appinfo.fissionAutostart ||
+      Services.appinfo.browserTabsRemoteAutostart,
+    "Limit Content Process Disabled Description should be shown if e10s is disabled, and hidden otherwise."
+  );
+
+  BrowserTestUtils.removeTab(gBrowser.selectedTab);
+});