Examine source code of EnvGuard

{
  "manifest_version": 3,
  "name": "EnvGuard",
  "version": "1.0.0",
  "description": "Visually flags whether a site is dev or production so you never mix them up.",
  "icons": {
    "16": "icons/icon.svg",
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "background": {
    "scripts": [
      "src/shared/storage.js",
      "src/background.js"
    ]
  },
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon.svg",
      "32": "icons/icon.svg",
      "48": "icons/icon.svg",
      "96": "icons/icon.svg"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/shared/storage.js",
        "src/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1e5d989-5f62-4e2a-a11a-8d6b40505f2d}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}