Examine source code of MyAnimeList Highlighter

{
  "manifest_version": 2,
  "name": "MyAnimeList Highlighter",
  "version": "2.1",
  "description": "Highlights shows when accessing an artist entry on the database. The color is chosen based on how the user has marked the show (watching, watched, on-hold, dropped or planned to watch).",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://myanimelist.net/people/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}