Examine source code of LectioBeautifier

{
  "manifest_version": 3,
  "name": "LectioBeautifier",
  "version": "0.1.1",
  "description": "Giv Lectio et personligt udseende med forskellige temaer.",
  "icons": {
    "57": "images/favicon57.png"
  },
  "action": {
    "default_title": "LectioBeautifier",
    "default_icon": {
      "57": "images/favicon57.png"
    },
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "js": [
        "lectiobeautifier.js"
      ],
      "matches": [
        "https://www.lectio.dk/*"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "images/*.png",
        "images/*.jpg"
      ],
      "matches": [
        "https://www.lectio.dk/*"
      ]
    }
  ],
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9aef8ea7-8678-4253-8891-51ad1beb8490}"
    }
  }
}