diff --git a/manifest.json b/manifest.json
index 61e063ea9..5abbccae0 100644
--- a/manifest.json
+++ b/manifest.json
@@ -4,8 +4,8 @@
   "name": "GNU Taler Wallet (git)",
   "description": "Privacy preserving and transparent payments",
   "author": "GNU Taler Developers",
-  "version": "0.6.69",
-  "version_name": "0.6.0pre2",
+  "version": "0.6.70",
+  "version_name": "0.6.0pre3",
 
   "minimum_chrome_version": "51",
   "minimum_opera_version": "36",
diff --git a/src/webex/background.ts b/src/webex/background.ts
index 3c63f323e..dbc540df4 100644
--- a/src/webex/background.ts
+++ b/src/webex/background.ts
@@ -23,7 +23,7 @@
 /**
  * Imports.
  */
-import {wxMain} from "./wxBackend";
+import { wxMain } from "./wxBackend";
 
 window.addEventListener("load", () => {
   wxMain();
diff --git a/src/webex/pages/tip.tsx b/src/webex/pages/tip.tsx
index 0a066053b..148b8203c 100644
--- a/src/webex/pages/tip.tsx
+++ b/src/webex/pages/tip.tsx
@@ -88,7 +88,7 @@ function TipDisplay(props: { talerTipUri: string }) {
       </p>
       <form className="pure-form">
         <ProgressButton loading={loading} onClick={() => accept()}>
-          AcceptTip
+          Accept Tip
         </ProgressButton>
         {" "}
         <button className="pure-button" type="button" onClick={() => discard()}>
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(
   });
 }
 
+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() {
-  chrome.runtime.onInstalled.addListener(details => {
-    if (details.reason === "install") {
-      const url = chrome.extension.getURL("/src/webex/pages/welcome.html");
-      chrome.tabs.create({ active: true, url: url });
-    }
-  });
-
   // 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 => {