Examine source code of Pomodoro Timer Tool

{
  "manifest_version": 2,
  "name": "Pomodoro Timer Tool",
  "version": "1.0",
  "description": "This utility will help users focus on studying by dividing time into work and rest cycles, based on the Pomodoro method.",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "images/pomo-logo.png"
    }
  },
  "icons": {
    "128": "images/pomo-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f97224a-7500-4605-9fde-1fefbdca42e8}"
    }
  }
}