manifest.json

{

    "manifest_version": 2,
    "name": "Lichess enhancement",
    "version": "1.5",
  
    "description": "New styles of pieces and boards for Lichess",
    "homepage_url": "https://github.com/ducksper/lichess_enhancement",
    "icons": {
      "48": "ressources/logo/chesscom_pawn.png"
    },

    "permissions": [
        "activeTab",
        "storage"
    ],
  
    "content_scripts": [
      {
        "matches": ["*://*.lichess.org/*"],
        "js": [
          "main.js",
          "ressources/js/arrive.js",
          "ressources/js/Boards.js",
          "ressources/js/Pieces.js"
        ],
        "run_at": "document_end",
        "all_frames": true
      }
    ],

    "background": {
      "scripts": ["background.js"],
      "persistent": true
    },

    "browser_action": {
        "default_icon": "ressources/logo/chesscom_pawn.png",
        "default_title": "Lichess enhancement",
        "default_popup": "index.html"
    },

    "web_accessible_resources": [
      "ressources/*"
    ]
  
}