Examine source code of Free Chess Analyser

{
  "manifest_version": 3,
  "name": "Free Chess Analyser",
  "description": "Analyse your games on chess.com for free (not affiliated with Chess.com). Click on the Icon to start !",
  "version": "1.5",
  "icons": {
    "128": "icon4800.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.chess.com/game/live/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://www.chess.com/games/archive",
        "https://www.chess.com/games/archive/*",
        "https://www.chess.com/home"
      ],
      "js": [
        "archive.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_icon": "icon4800.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "freechessanalysis@ari-code.com"
    }
  }
}