Examine source code of Focus Mode Cm V2

{
  "manifest_version": 2,
  "name": "Focus Mode V2",
  "version": "1.3",
  "description": "Helps users stay focused by blocking distracting websites and enabling a customizable focus session.",
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/logo_32.png",
      "64": "icons/logo_64.png",
      "128": "icons/logo_128.png"
    }
  },
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e48133c0-994d-49ef-8af7-405d6180cbe2}"
    }
  }
}