Show installation notes page on first install.

go-back-with-backspace/background.js

Index: go-back-with-backspace/background.js
diff --git a/go-back-with-backspace/background.js b/go-back-with-backspace/background.js
new file mode 100644
index 0000000000000000000000000000000000000000..dada8c845c4a852ba5f52e03c4c0f7daafdd01cb
--- /dev/null
+++ b/go-back-with-backspace/background.js
@@ -0,0 +1,6 @@
+// Put up an informative message on first install.
+chrome.runtime.onInstalled.addListener(function(details) {
+  if (details.reason == "install") {
+    chrome.tabs.create({url: "installed.html"});
+  }
+});