Examine source code of Celestus Plus

{
  "manifest_version": 3,
  "name": "Celestus Plus",
  "version": "1.7.8",
  "description": "outil d'aide sur Celestus",
  "permissions": [
    "tabs",
    "activeTab",
    "clipboardWrite",
    "clipboardRead",
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "style.css",
        "injected.css"
      ],
      "matches": [
        "https://horizon.celestus.fr/*"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{813a6e1f-153c-4ba6-afad-9b5c16f984e7}",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "websiteActivity"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://horizon.celestus.fr/game.php*"
      ],
      "js": [
        "contentScript/game_main_page/onPlaneteSelected.js",
        "contentScript/game_main_page/CartesSS.js",
        "contentScript/game_main_page/ListeFlottes.js",
        "contentScript/game_main_page/academie.js",
        "contentScript/game_main_page/carteGalactique.js",
        "contentScript/game_main_page/couronneOrbitale.js",
        "contentScript/game_main_page/domModifyObserver.js",
        "contentScript/game_main_page/listeCelestus.js",
        "contentScript/game_main_page/pageFlottes.js",
        "contentScript/game_main_page/ficheJoueur.js",
        "contentScript/game_main_page/portes.js",
        "contentScript/game_main_page/pageEmpire.js",
        "contentScript/game_main_page/pageRessources.js",
        "contentScript/game_main_page/PageGestionFlottes.js",
        "contentScript/game_main_page/PageRenseignements.js",
        "contentScript/game_main_page/pageActions.js",
        "contentScript/game_main_page/pageExplo.js",
        "contentScript/game_main_page/raccourcis.js",
        "contentScript/game_main_page/ListePlanetes.js",
        "contentScript/game_main_page/PageGuildes.js",
        "contentScript/game_main_page/pageOrdinateur.js",
        "contentScript/game_main_page/pageUnivers.js",
        "contentScript/game_main_page/pageBatiment.js",
        "contentScript/popup/notificationAT.js"
      ]
    },
    {
      "matches": [
        "https://horizon.celestus.fr/CelestusV2/Interface/Radar.php*"
      ],
      "js": [
        "contentScript/radar/pageRadar.js"
      ]
    },
    {
      "matches": [
        "https://horizon.celestus.fr/CelestusV2/RC/*"
      ],
      "js": [
        "contentScript/RC/RC_stats_bridge.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://horizon.celestus.fr/CelestusV2/RC/*"
      ],
      "js": [
        "contentScript/RC/RC_stats_popup.js"
      ],
      "run_at": "document_idle",
      "world": "MAIN"
    }
  ]
}