Examine source code of Vaulteron

{
  "manifest_version": 3,
  "name": "Vaulteron",
  "description": "Official browser extension for Vaulteron",
  "version": "1.1.6",
  "action": {
    "default_popup": "index.html",
    "default_title": "Vaulteron"
  },
  "icons": {
    "128": "logo128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "optional_permissions": [
    "webRequest",
    "<all_urls>"
  ],
  "optional_host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "css": [
        "contentScript.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "contentScript.css",
        "libs/mui.min.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fc9ae264-3e35-4337-b265-7bb7af6f3660}",
      "strict_min_version": "106.0"
    }
  }
}