Examine source code of Save to Freshreader

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "version": "1.0.3",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "manifest_version": 2,
  "browser_action": {
    "browser_style": true,
    "default_icon": "images/icon.png",
    "default_title": "Freshreader"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "icons": {
    "16": "images/icon.png",
    "48": "images/icon.png",
    "128": "images/icon.png"
  }
}