Examine source code of USDB Plus

{
  "manifest_version": 2,
  "name": "USDB Plus",
  "version": "1.2.2",
  "description": "Customize UI of usdb.animux.de",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "usdb-plus@amo.example.com"
    }
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://usdb.animux.de/*?link=list*"
      ],
      "js": [
        "scripts/highlight_search_results.bundle.js"
      ]
    },
    {
      "matches": [
        "https://usdb.animux.de/*?link=detail*"
      ],
      "js": [
        "scripts/highlight_detail_page.bundle.js"
      ]
    }
  ]
}