Examine source code of LFB+

{
  "manifest_version": 2,
  "name": "LFB+",
  "version": "2.5",
  "author": "Harald Hentschel",
  "description": "Improves the presentation of the pages for searching and the presentation of a training.",
  "homepage_url": "https://github.com/Mr-DblH/LFBPlus",
  "icons": {
    "48": "icons/lfbPlusIcon-48.png",
    "96": "icons/lfbPlusIcon-96.png",
    "128": "icons/lfbPlusIcon-128.png"
  },
  "permissions": [
    "clipboardWrite"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.kultus-bw.de/*"
      ],
      "js": [
        "lfbPlus.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{59d3eba7-3e17-46d5-ad37-a49464ad0221}"
    }
  }
}