1 files changed, 13 insertions, 6 deletions
diff --git a/src/webex/wxBackend.ts b/src/webex/wxBackend.ts
index 564ee24f0..16cd2a78c 100644
--- a/src/webex/wxBackend.ts
+++ b/src/webex/wxBackend.ts
@@ -547,19 +547,26 @@ function injectScript(
   });
 }
 
-/**
- * Main function to run for the WebExtension backend.
- *
- * Sets up all event handlers and other machinery.
- */
-export async function wxMain() {
+try {
+  // This needs to be outside of main, as Firefox won't fire the event if
+  // the listener isn't created synchronously on loading the backend.
   chrome.runtime.onInstalled.addListener(details => {
+    console.log("onInstalled with reason", details.reason);
     if (details.reason === "install") {
       const url = chrome.extension.getURL("/src/webex/pages/welcome.html");
       chrome.tabs.create({ active: true, url: url });
     }
   });
+} catch (e) {
+  console.error(e);
+}
 
+/**
+ * Main function to run for the WebExtension backend.
+ *
+ * Sets up all event handlers and other machinery.
+ */
+export async function wxMain() {
   // Explicitly unload the extension page as soon as an update is available,
   // so the update gets installed as soon as possible.
   chrome.runtime.onUpdateAvailable.addListener(details => {