--- a/toolkit/components/extensions/test/xpcshell/test_ext_telemetry.js
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_telemetry.js
@@ -1,11 +1,12 @@
 "use strict";
 
 ChromeUtils.import("resource://gre/modules/TelemetryArchive.jsm", this);
+ChromeUtils.import("resource://gre/modules/TelemetryUtils.jsm", this);
 
 function createExtension(backgroundScript, permissions) {
   let extensionData = {
     background: backgroundScript,
     manifest: {permissions},
   };
   return ExtensionTestUtils.loadExtension(extensionData);
 }
@@ -323,8 +324,38 @@ add_task(async function test_telemetry_s
     },
     doneSignal: "submit_ping",
   });
 
   let pings = await TelemetryArchive.promiseArchivedPingList();
   equal(pings.length, 1);
   equal(pings[0].type, "webext-test");
 });
+
+add_task(async function test_telemetry_can_upload_enabled() {
+  Services.prefs.setBoolPref(TelemetryUtils.Preferences.FhrUploadEnabled, true);
+
+  await run({
+    backgroundScript: async () => {
+      const result = await browser.telemetry.canUpload();
+      browser.test.assertTrue(result);
+      browser.test.notifyPass("can_upload_enabled");
+    },
+    doneSignal: "can_upload_enabled",
+  });
+
+  Services.prefs.clearUserPref(TelemetryUtils.Preferences.FhrUploadEnabled);
+});
+
+add_task(async function test_telemetry_can_upload_disabled() {
+  Services.prefs.setBoolPref(TelemetryUtils.Preferences.FhrUploadEnabled, false);
+
+  await run({
+    backgroundScript: async () => {
+      const result = await browser.telemetry.canUpload();
+      browser.test.assertFalse(result);
+      browser.test.notifyPass("can_upload_disabled");
+    },
+    doneSignal: "can_upload_disabled",
+  });
+
+  Services.prefs.clearUserPref(TelemetryUtils.Preferences.FhrUploadEnabled);
+});