Examine source code of Pomodoro_Timer

{
  "manifest_version": 2,
  "name": "Pomodoro",
  "version": "1.1resigned1",
  "description": "Used to help users study",
  "icons": {
    "48": "icons/tomato.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/tomato.png"
    },
    "default_title": "Study",
    "default_popup": "popup/timer.html"
  },
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "Pomodoro.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{73ed0385-3726-4779-9a75-1ea047c2b518}"
    }
  }
}