Examine source code of Gwent Profile Helper

{
  "name": "Gwent Profile Helper",
  "version": "1.1",
  "manifest_version": 2,
  "description": "Show opponent's stats in Match History",
  "homepage_url": "https://github.com/Egor3f/gwent-profile-helper",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.playgwent.com/*"
      ],
      "css": [
        "src/inject/inject.css"
      ]
    },
    {
      "run_at": "document_end",
      "matches": [
        "https://www.playgwent.com/*"
      ],
      "js": [
        "src/inject/inject.js"
      ]
    }
  ]
}