1 files changed, 43 insertions, 0 deletions
diff --git a/browser/components/resistfingerprinting/test/browser/browser_block_mozAddonManager.js b/browser/components/resistfingerprinting/test/browser/browser_block_mozAddonManager.js
new file mode 100644
index 0000000000..e9f55ef667
--- /dev/null
+++ b/browser/components/resistfingerprinting/test/browser/browser_block_mozAddonManager.js
@@ -0,0 +1,43 @@
+/**
+ * Bug 1384330 - A test case for making sure the navigator.mozAddonManager will
+ *   be blocked when pref 'privacy.resistFingerprinting.block_mozAddonManager' is true.
+ */
+
+const HTTPS_TEST_PATH =
+  "https://example.com/browser/browser/" +
+  "components/resistfingerprinting/test/browser/";
+
+add_task(async function test() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["extensions.webapi.testing", true]],
+  });
+
+  for (let pref of [false, true]) {
+    await SpecialPowers.pushPrefEnv({
+      set: [["privacy.resistFingerprinting.block_mozAddonManager", pref]],
+    });
+
+    let tab = await BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      HTTPS_TEST_PATH + "file_dummy.html"
+    );
+
+    await SpecialPowers.spawn(tab.linkedBrowser, [pref], function (aPref) {
+      if (aPref) {
+        is(
+          content.navigator.mozAddonManager,
+          undefined,
+          "The navigator.mozAddonManager should not exist when the pref is on."
+        );
+      } else {
+        ok(
+          content.navigator.mozAddonManager,
+          "The navigator.mozAddonManager should exist when the pref is off."
+        );
+      }
+    });
+
+    BrowserTestUtils.removeTab(tab);
+    await SpecialPowers.popPrefEnv();
+  }
+});