Bird Spotter - Detect Twitter users

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Bird Spotter - Detect Twitter users",
  "version": "3.0.0",
  "manifest_version": 2,
  "description": "Easily discover Twitter users on pages",
  "icons": {
    "16": "icons/Chrome_Bird_Spotter_icon_16.png",
    "48": "icons/Chrome_Bird_Spotter_icon_48.png",
    "128": "icons/Chrome_Bird_Spotter_icon_128.png"
  },
  "offline_enabled": true,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "ftp://*/*"
      ],
      "run_at": "document_idle",
      "js": [
        "bird_spotter.js"
      ]
    }
  ],
  "options_page": "options.html",
  "page_action": {
    "default_icon": "icons/twitter-bird-light-bgs.png",
    "default_title": "Bird Spotter",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ]
}