Examine source code of Clockify Balance

{
  "manifest_version": 2,
  "name": "Clockify Balance",
  "description": "clockify.me work time balance",
  "version": "1.0.6",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "js": [
        "js/content.js"
      ],
      "matches": [
        "https://*.clockify.me/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "https://*.clockify.me/*",
    "tabs",
    "webRequest"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dfde70e8-cf1d-4fec-96a4-bc58b18c8c19}"
    }
  }
}