Examine source code of LichessFreeze

{
  "manifest_version": 2,
  "name": "ChessFreeze",
  "version": "1.1",
  "description": "Freezes Lichess visuals when hitting the key q",
  "icons": {
    "48": "icons/pawnIcon-48.png"
  },
  "permissions": [
    "storage",
    "*://*.lichess.org/*"
  ],
  "page_action": {
    "default_icon": "icons/pawnIcon-48.png",
    "default_title": "ChessFreeze"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.lichess.org/*"
      ],
      "js": [
        "ChessFreeze.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cfd103ed-7a69-4178-b255-1f30327055c7}"
    }
  }
}