Move to an already opened tab

manifest.json

{
  "manifest_version": 2,
  "name": "Move to an already opened tab",
  "version": "1.0.1resigned1",
  "description": "Go to the tab that has already been opened.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/enable.png",
    "default_title": "Move to an already opened tab"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "tabs"
  ],
  "web_accessible_resources": [
    "icons/*.png"
  ],
  "applications": {
    "gecko": {
      "id": "{4d6c678e-3dbe-47d1-a42a-8b9011cc6af1}"
    }
  }
}