Examine source code of CRLarger

{
  "manifest_version": 2,
  "name": "CRLarger",
  "version": "1.32",
  "description": "An Add-on for making the default Crunchyroll player larger. Also adds an optional dark theme.",
  "icons": {
    "30": "icon/crlarger.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.crunchyroll.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content/dark.js",
        "content/crlarger.js"
      ],
      "css": [
        "content/css/crdark_general.css",
        "content/css/crdark_lists.css"
      ]
    },
    {
      "matches": [
        "*://*.crunchyroll.com/"
      ],
      "run_at": "document_start",
      "css": [
        "content/css/crdark_homepage.css"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "crlarger@overengineered.systems"
    }
  },
  "browser_action": {
    "default_icon": {
      "30": "icon/crlarger.png"
    },
    "default_title": "CRLarger",
    "default_popup": "pages/short-opts/short-opts.html"
  },
  "background": {
    "scripts": [
      "utils/install.js",
      "utils/confcom.js"
    ]
  },
  "permissions": [
    "storage"
  ]
}