Examine source code of Multi Question Lines

{
  "description": "An addon modifies web forms and creates multi question lines",
  "manifest_version": 2,
  "name": "Multi Question Lines",
  "version": "2.3",
  "homepage_url": "https://github.com/DatoJanez/multi-question-lines",
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/forms/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}