diff --git a/extension/background/timerThread.js b/extension/background/timerThread.js
new file mode 100644
index 000000000..a42b0edf6
--- /dev/null
+++ b/extension/background/timerThread.js
@@ -0,0 +1,3 @@
+onmessage = function(e) {
+  self.setInterval(() => postMessage(true), e.data.interval);
+}