Examine source code of SafeLinks Decoder

{
  "manifest_version": 2,
  "name": "SafeLinks Decoder",
  "version": "1.0",
  "description": "Decodes SafeLinks URLs.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon.png",
      "128": "icons/icon.png"
    }
  },
  "permissions": [
    "clipboardWrite",
    "storage"
  ],
  "icons": {
    "48": "icons/icon.png",
    "128": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{addfe745-e8ee-4089-b001-39385b40bbdb}"
    }
  }
}