Examine source code of MAL Buttons

{
  "manifest_version": 2,
  "name": "MAL Buttons",
  "version": "1.1",
  "description": "Adds a button on MAL entries that takes you to the corresponding page for the anime on AniMixPlay/Aniwatch.",
  "icons": {
    "48": "icons/malbuttons-48.png",
    "96": "icons/malbuttons-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.myanimelist.net/*"
      ],
      "js": [
        "malbuttons.js"
      ]
    }
  ]
}