chromium/chrome/test/data/extensions/api_test/content_scripts/about_blank_srcdoc/manifest.json

{
  "name": "about:blank and about:srcdoc",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Tests that content scripts are injected in about:blank and about:srcdoc frames if it has access to the parent frame.",
  "background": {
    "scripts": ["test.js"],
    "persistent": true
  },
  "optional_permissions": ["*://*/*"],
  "content_scripts": [
    {
      "matches": ["*://*/*.html*"],
      "match_about_blank": true,
      "js": ["content_script.js"],
      "all_frames": true
    }
  ],
  "permissions": ["tabs"]
}