Examine source code of UComment

{
  "manifest_version": 2,
  "short_name": "UComment",
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "version": "0.6.1",
  "default_locale": "en",
  "web_accessible_resources": [
    "img/*",
    "html/*"
  ],
  "permissions": [
    "contextMenus"
  ],
  "icons": {
    "16": "img/c_icon_red16.png",
    "48": "img/c_icon_red48.png",
    "128": "img/c_icon_red9632.png"
  },
  "background": {
    "scripts": [
      "vendor/jquery.min.js",
      "js/shared.min.js",
      "js/baseUtil.min.js",
      "js/base.min.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "*://*.ucomment.me/*"
      ],
      "js": [
        "vendor/jquery.min.js",
        "js/shared.min.js",
        "js/contentUtil.min.js",
        "js/content.min.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "img/c_icon_grey16.png",
      "32": "img/c_icon_grey32.png",
      "48": "img/c_icon_grey48.png",
      "128": "img/c_icon_grey9632.png"
    },
    "default_title": "UComment",
    "default_popup": "html/popover.html"
  }
}