Examine source code of ChronoTrec

{
  "manifest_version": 3,
  "name": "ChronoTrec",
  "version": "1.1.1",
  "description": "Track your work time elegantly and stay focused on what matters",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c17e5f90-a2bc-4c5d-9a6e-f6f3f8d32c80}",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "32": "icons/timer-32.png",
    "48": "icons/timer-48.png",
    "64": "icons/timer-64.png",
    "96": "icons/timer-96.png",
    "128": "icons/timer-128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_icon": {
      "32": "icons/timer-32.png",
      "48": "icons/timer-48.png",
      "64": "icons/timer-64.png",
      "96": "icons/timer-96.png",
      "128": "icons/timer-128.png"
    },
    "default_title": "ChronoTrec"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}