chromium/chrome/test/data/extensions/api_test/tabs/capture_visible_tab/test_png/manifest.json

{
  "name": "chrome.tabs.captureVisibleTab test: jpeg",
  "version": "0.1",
  "manifest_version": 2,
  "description": "end-to-end browser test for chrome.tabs.captureVisibleTab",
  "background": {
    "scripts": ["test_png.js"],
    "persistent": true
  },
  "permissions": ["tabs", "<all_urls>"]
}