Examine source code of Fix Codewars Buttons

{
  "manifest_version": 2,
  "name": "Fix Codewars Buttons",
  "version": "1.0",
  "description": "Fixes the buttons on the Kata pages so they display correctly on my computer at full screen.\n\nhttps://github.com/Codewars/codewars.com/issues/1839",
  "content_scripts": [
    {
      "matches": [
        "*://*.codewars.com/kata/*"
      ],
      "js": [
        "fix-codewars-buttons.js"
      ]
    }
  ]
}