initial commit

extension/background.js

@@ -0,0 +1,12 @@
+let port = null;
+
+browser.runtime.onMessage.addListener(message => {
+    if (port == null || port.error) {
+        port = browser.runtime.connectNative('cheetah');
+    }
+    try {
+        port.postMessage(message);
+    } catch (error) {
+        port = null;
+    }
+});