Where is my tab?

manifest.json

{
  "update_url": "http://clients2.google.com/service/update2/crx",
  "name": "Where is my tab?",
  "version": "1.1",
  "manifest_version": 2,
  "description": "Search in tabs.",
  "icons": {
    "16": "media/icon16.png",
    "48": "media/icon48.png",
    "128": "media/icon128.png"
  },
  "browser_action": {
    "default_icon": "media/icon19.png",
    "default_title": "Where is my tab?",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'"
}