Examine source code of browser time counter

{
  "manifest_version": 3,
  "version": "1.0.5",
  "name": "browser time counter",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "videoBackGroundCheck.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "permissions": [
    "storage",
    "webNavigation",
    "tabs",
    "scripting"
  ],
  "action": {
    "default_icon": "/visual/gaben_gif.webp",
    "default_title": "time counter",
    "default_popup": "/visual/view.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bobbymerde@gmail.com",
      "strict_min_version": "109.0"
    }
  }
}