Tab-Link Highlighter

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Tab-Link Highlighter",
  "short_name": "TLH",
  "description": "Highlights a link in a Google/GoogleScholar/Amazon/Youtube search if it is already open in another tab",
  "version": "1.1.0",
  "author": "Devin Wright",
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "options_page": "options.html",
  "content_scripts": [
    {
      "matches": [
        "http://www.google.com/*",
        "https://www.google.com/*",
        "http://scholar.google.com/*",
        "https://scholar.google.com/*",
        "http://www.amazon.com/*",
        "https://www.amazon.com/*",
        "http://www.youtube.com/*",
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage"
  ]
}