Examine source code of PR Review Priority

{
  "manifest_version": 2,
  "name": "PR Review Priority",
  "description": "Set priorities for your GitHub PR review comments",
  "version": "1.0.1",
  "icons": {
    "128": "logo-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "js/vendor.js",
        "js/content-script.js"
      ]
    }
  ]
}