Examine source code of Tiny Timer

{
  "manifest_version": 2,
  "name": "Tiny Timer",
  "version": "1.1resigned1",
  "description": "a basic timer.",
  "icons": {
    "32": "icons/icon32.png"
  },
  "background": {
    "scripts": [
      "popup/timer.js",
      "popup/msg.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon16.png",
    "default_title": "Tiny Timer",
    "default_popup": "popup/page.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{167130f2-e68a-46e8-a5f9-5d8ff48e42c5}"
    }
  }
}