Examine source code of Open Tabs from File

{
  "author": "igorlogius",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_area": "navbar"
  },
  "description": "Reads URLs from a text file and opens them as unloaded tabs",
  "icons": {
    "256": "icon.png"
  },
  "manifest_version": 2,
  "name": "Open Tabs from file",
  "options_ui": {
    "page": "dialog.html"
  },
  "permissions": [],
  "version": "1.0.4",
  "browser_specific_settings": {
    "gecko": {
      "id": "{9a20cf4a-6d0d-4ce0-8178-aef363ae2589}"
    }
  }
}