diff --git a/testing/talos/talos/webextensions/dummy/background.js b/testing/talos/talos/webextensions/dummy/background.js
index 677f47bee348..f7e6c55fc248 100644
--- a/testing/talos/talos/webextensions/dummy/background.js
+++ b/testing/talos/talos/webextensions/dummy/background.js
@@ -35,3 +35,22 @@ browser.webRequest.onErrorOccurred.addListener(
   details => {
   },
   {urls: ["https://*/*", "http://*/*"]});
+
+
+browser.tabs.onUpdated.addListener((tabId, changed, tab) => {
+});
+
+browser.tabs.onActivated.addListener(({tabId, windowId}) => {
+});
+
+browser.tabs.onCreated.addListener(tab => {
+});
+
+browser.tabs.onRemoved.addListener((tabId, removeInfo) => {
+});
+
+browser.tabs.onAttached.addListener((tabId, attachInfo) => {
+});
+
+browser.tabs.onDetached.addListener((tabId, detachInfo) => {
+});
diff --git a/testing/talos/talos/webextensions/dummy/manifest.json b/testing/talos/talos/webextensions/dummy/manifest.json
index b1e478817e23..76ea43f12599 100644
--- a/testing/talos/talos/webextensions/dummy/manifest.json
+++ b/testing/talos/talos/webextensions/dummy/manifest.json
@@ -10,6 +10,7 @@
   "permissions": [
     "http://*/",
     "https://*/",
+    "tabs",
     "webRequest",
     "webRequestBlocking"
   ],