Custom Tab Names for Gmail

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Custom Tab Names for Gmail",
  "description": "Alters the names of Gmail tabs for convenience.",
  "version": "1.0",
  "author": "Collin Johnson",
  "permissions": [
    "tabs",
    "*://*.google.com/*"
  ],
  "background": {
    "scripts": [
      "messenger.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "*://*.google.com/*"
      ],
      "js": [
        "Replacer.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "img/icon.png",
    "default_popup": "popup.html"
  }
}