Examine source code of open issue modal

{
  "applications": {
    "gecko": {
      "id": "{391c8332-6c1a-42c5-aa61-cf2bc05ab3fc}",
      "strict_min_version": "42.0"
    }
  },
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "open modal github projects issue",
  "manifest_version": 2,
  "version": "1.1.4resigned1",
  "description": "open modal github projects issue",
  "browser_action": {
    "default_title": "open modal github projects issue",
    "default_popup": "index.html"
  },
  "permissions": [
    "contextMenus"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*/projects/*"
      ],
      "css": [
        "lib/css/colorbox.css"
      ],
      "js": [
        "lib/js/jquery-3.3.1.min.js",
        "lib/js/jquery.colorbox-min.js",
        "content_script.js"
      ]
    }
  ]
}