Examine source code of VTT Bridge

{
  "manifest_version": 2,
  "name": "VTT Bridge",
  "version": "1.6.3",
  "description": "Connect Dungeon Master's Vault to Roll20.",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.dungeonmastersvault.com/pages/dnd/5e/characters/*?frame=true"
      ],
      "js": [
        "dist/polyfill.js",
        "dist/dmv.js"
      ],
      "css": [
        "dist/dmv.css"
      ]
    },
    {
      "matches": [
        "*://app.roll20.net/editor*"
      ],
      "js": [
        "dist/polyfill.js",
        "dist/roll20.js"
      ],
      "css": [
        "dist/roll20.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "dist/polyfill.js",
      "dist/background.js"
    ]
  }
}