Examine source code of HNView

{
  "name": "__MSG_appName__",
  "version": "0.0.3resigned1",
  "manifest_version": 2,
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "images/icon-16.png",
    "128": "images/icon-128.png"
  },
  "default_locale": "en",
  "content_scripts": [
    {
      "matches": [
        "https://news.ycombinator.com/*"
      ],
      "css": [
        "styles/main.css"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3cc374fa-f075-45b8-94e4-3a62c4ce64c2}"
    }
  }
}