Examine source code of Psychological Tab Manager

{
  "manifest_version": 3,
  "name": "Psychological Tab Manager",
  "short_name": "PTM",
  "version": "1.4.1.1",
  "description": "Helps to not keep too many old tabs open by exploiting the human reward system",
  "author": "eiernase@kueheaufdsl.de",
  "homepage_url": "https://github.com/Eiernase/ThisTabIsOnFire",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ptm@kueheaufdsl.de",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "notifications"
  ],
  "background": {
    "scripts": [
      "service_worker.js"
    ]
  },
  "action": {
    "default_area": "navbar",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png",
      "96": "images/icon-96.png",
      "128": "images/icon-128.png"
    },
    "default_title": "Open PTM Config Menu"
  },
  "content_scripts": [
    {
      "js": [
        "scripts/content.js"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ]
}