diff --git a/netwerk/cookie/test/browser/browser.ini b/netwerk/cookie/test/browser/browser.ini
index bd6c15f57708..0d5e35fecce8 100644
--- a/netwerk/cookie/test/browser/browser.ini
+++ b/netwerk/cookie/test/browser/browser.ini
@@ -4,6 +4,7 @@ support-files =
   head.js
 
 [browser_broadcastChannel.js]
+[browser_indexedDB.js]
 [browser_originattributes.js]
 [browser_storage.js]
 [browser_sharedWorker.js]
diff --git a/netwerk/cookie/test/browser/browser_indexedDB.js b/netwerk/cookie/test/browser/browser_indexedDB.js
new file mode 100644
index 000000000000..fd125d3e6c23
--- /dev/null
+++ b/netwerk/cookie/test/browser/browser_indexedDB.js
@@ -0,0 +1,82 @@
+CookiePolicyHelper.runTest("IndexedDB", {
+  cookieJarAccessAllowed: async _ => {
+    content.indexedDB.open("test", "1");
+    ok(true, "IDB should be allowed");
+  },
+
+  cookieJarAccessDenied: async _ => {
+    try {
+      content.indexedDB.open("test", "1");
+      ok(false, "IDB should be blocked");
+    } catch (e) {
+      ok(true, "IDB should be blocked");
+      is(e.name, "SecurityError", "We want a security error message.");
+    }
+  },
+});
+
+CookiePolicyHelper.runTest("IndexedDB in workers", {
+  cookieJarAccessAllowed: async _ => {
+    function nonBlockCode() {
+      indexedDB.open("test", "1");
+      postMessage(true);
+    }
+
+    let blob = new content.Blob([nonBlockCode.toString() + "; nonBlockCode();"]);
+    ok(blob, "Blob has been created");
+
+    let blobURL = content.URL.createObjectURL(blob);
+    ok(blobURL, "Blob URL has been created");
+
+    let worker = new content.Worker(blobURL);
+    ok(worker, "Worker has been created");
+
+    await new content.Promise((resolve, reject) => {
+      worker.onmessage = function(e) {
+        if (e.data) {
+          resolve();
+        } else {
+          reject();
+        }
+      };
+
+      worker.onerror = function(e) {
+        reject();
+      };
+    });
+  },
+
+  cookieJarAccessDenied: async _ => {
+    function blockCode() {
+      try {
+        indexedDB.open("test", "1");
+        postMessage(false);
+      } catch (e) {
+        postMessage(e.name == "SecurityError");
+      }
+    }
+
+    let blob = new content.Blob([blockCode.toString() + "; blockCode();"]);
+    ok(blob, "Blob has been created");
+
+    let blobURL = content.URL.createObjectURL(blob);
+    ok(blobURL, "Blob URL has been created");
+
+    let worker = new content.Worker(blobURL);
+    ok(worker, "Worker has been created");
+
+    await new content.Promise((resolve, reject) => {
+      worker.onmessage = function(e) {
+        if (e.data) {
+          resolve();
+        } else {
+          reject();
+        }
+      };
+
+      worker.onerror = function(e) {
+        reject();
+      };
+    });
+  },
+});