Examine source code of Link Alert

{
  "manifest_version": 2,
  "name": "Link Alert",
  "version": "2.0.2resigned1",
  "author": "Conlan Wesson",
  "homepage_url": "https://www.cwesson.net/projects/LinkAlert/",
  "default_locale": "en",
  "description": "Changes the cursor to indicate the target of a link.",
  "icons": {
    "48": "icons/linkalert-32.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/defaults.js",
        "src/linkalert.js",
        "src/mousebox.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "src/options.html"
  },
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    "icons/small/*-icon.png",
    "icons/large/*-icon.png",
    "icons/none-icon.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "linkalert.conlan@addons.mozilla.com"
    }
  }
}