chromium/chrome/test/data/extensions/manifest_tests/content_script_execution_world_warning_for_mv2.json

{
  "name": "ContentScriptsManifestTest.ExecutionWorld_InvalidForMV2",
  "version": "0.1",
  "manifest_version": 2,
  "content_scripts": [{
    "matches": ["https://example.com/*"],
    "js": ["file.js"],
    "world": "MAIN"
  }]
}