Gmail™ Instant Title Links

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Gmail™ Instant Title Links",
  "description": "Automatically turn URLs in gmail titles clickable links",
  "version": "2.0",
  "permissions": [
    "https://*/*",
    "http://*/*",
    "activeTab",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ]
}