Examine source code of mew Beta

{
  "manifest_version": 3,
  "name": "mew Beta",
  "description": "Pilotez l'empreinte environnementale de vos IA",
  "default_locale": "en",
  "version": "1.5.4",
  "homepage_url": "https://mewbeta.fr",
  "minimum_chrome_version": "111",
  "browser_specific_settings": {
    "gecko": {
      "id": "adam@mewbeta.fr",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "webRequest"
  ],
  "host_permissions": [
    "https://chatgpt.com/backend-*/f/*",
    "https://claude.ai/api/organizations/*",
    "https://gemini.google.com/_/BardChatUi/*",
    "https://chat.mistral.ai/api/*",
    "https://wwzfjiogscvmozzptbbg.supabase.co/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://chatgpt.com/*",
        "https://claude.ai/*",
        "https://gemini.google.com/*",
        "https://chat.mistral.ai/*"
      ],
      "js": [
        "bridge.js"
      ],
      "run_at": "document_end",
      "world": "ISOLATED"
    },
    {
      "matches": [
        "https://chatgpt.com/*",
        "https://claude.ai/*",
        "https://gemini.google.com/*",
        "https://chat.mistral.ai/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    }
  ]
}