Examine source code of myhours

{
  "manifest_version": 2,
  "name": "myhours",
  "description": "Track your time on myhours.com",
  "version": "0.2.0",
  "icons": {
    "16": "icon-16.519372c7.png",
    "32": "icon-32.b48cb7dc.png",
    "48": "icon-48.3de2d344.png",
    "96": "icon-96.2c199a2b.png",
    "128": "icon-128.be150b7e.png",
    "256": "icon-256.4d84fe33.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icon-16.519372c7.png",
      "32": "icon-32.b48cb7dc.png",
      "48": "icon-48.3de2d344.png",
      "96": "icon-96.2c199a2b.png",
      "128": "icon-128.be150b7e.png",
      "256": "icon-256.4d84fe33.png"
    },
    "default_title": "Track time on myhours",
    "default_popup": "Popup.364affa5.html"
  },
  "options_ui": {
    "page": "Options.227ac7d7.html"
  },
  "permissions": [
    "*://api2.myhours.com/api/*",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{859406f6-616e-4dd9-af1a-61683d755b8a}"
    }
  }
}