Examine source code of Link Detector

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "author": "__MSG_appAuthor__",
  "default_locale": "en",
  "version": "2.5resigned1",
  "icons": {
    "16": "imgs/16.png",
    "24": "imgs/24.png",
    "48": "imgs/48.png",
    "128": "imgs/128.png"
  },
  "options_ui": {
    "page": "options/opt.html",
    "chrome_style": false,
    "open_in_tab": true
  },
  "manifest_version": 2,
  "homepage_url": "http://www.apis.bg",
  "version_name": "2.4",
  "content_security_policy": "default-src 'self' *.eurocaes.eu; style-src 'self' 'unsafe-inline'; script-src 'self'; object-src 'self'",
  "browser_action": {
    "default_title": "Link Detector",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "20": "imgs/24.png"
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "contextMenus",
    "notifications",
    "idle",
    "downloads",
    "<all_urls>",
    "storage"
  ],
  "background": {
    "scripts": [
      "background/res.js",
      "background/bg.js"
    ]
  },
  "web_accessible_resources": [
    "imgs/*.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content/content-script.js",
        "lib/purify.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "EuLinksCheckerFF@apis.bg"
    }
  }
}