Add MSFT Edge keys to manifest.json

app/manifest.json

@@ -3,6 +3,7 @@
   "short_name": "Metamask",
   "version": "2.7.3",
   "manifest_version": 2,
+  "author": "https://metamask.io",
   "description": "Ethereum Browser Extension",
   "icons": {
     "16": "images/icon-16.png",
@@ -18,7 +19,8 @@
     "scripts": [
       "scripts/chromereload.js",
       "scripts/background.js"
-    ]
+    ],
+    "persistent": true
   },
   "browser_action": {
     "default_icon": {