Examine source code of Counter

{
  "name": "Counter",
  "version": "1.1",
  "manifest_version": 2,
  "description": "Счётчик переходов по ссылкам",
  "short_name": "Счётчик переходов",
  "homepage_url": "https://counter.host/",
  "browser_action": {
    "default_title": "Counter.host",
    "default_icon": "icons/19x19.png",
    "default_popup": "popup.html",
    "name": "Counter.host"
  },
  "icons": {
    "19": "icons/19x19grey.png",
    "32": "icons/32x32.png",
    "48": "icons/48x48.png",
    "64": "icons/64x64.png",
    "128": "icons/128x128.png"
  },
  "permissions": [
    "activeTab"
  ]
}