Adds some integration with firefox.

This is still rather unstable, but it runs.

add-on/background.js

@@ -0,0 +1,29 @@
+var port = browser.runtime.connectNative("universal_music")
+
+/**
+ * Sends a message to the application
+ */
+function writeMessage(message)
+{
+    port.postMessage(message)
+}
+
+/**
+ * Sends a message to the application
+ */
+function onAppMessage(message)
+{
+    if ("command" in message)
+    {
+        switch (message["command"])
+        {
+        case "ping":
+            writeMessage({
+                "response": "ping"
+            });
+            break
+        }
+    }
+}
+
+port.onMessage.addListener(onAppMessage);

add-on/intermediary_manifest.json

@@ -0,0 +1,7 @@
+{
+  "name": "universal_music",
+  "description": "A link between the Universal Music Player and the web browser.",
+  "path": "${LINK_PATH}",
+  "type": "stdio",
+  "allowed_extensions": ["universal_music@regis.edu"]
+}

add-on/manifest.json

@@ -0,0 +1,30 @@
+{
+  "description": "An add-on to link the Universal Music Player to compatible web music players.",
+  "manifest_version": 2,
+  "name": "Universal Music Addon",
+  "version": "0.1",
+  "icons": {
+    "16": "icon.svg",
+    "32": "icon.svg",
+    "64": "icon.svg",
+    "128": "icon.svg",
+    "256": "icon.svg",
+    "512": "icon.svg"
+  },
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "universal_music@regis.edu",
+      "strict_min_version": "55.0"
+    }
+  },
+
+  "background": {
+    "scripts": ["background.js"]
+  },
+
+  "browser_action": {
+    "default_icon": "icon.svg"
+  },
+
+  "permissions": ["nativeMessaging"]
+}