NoSpoofing

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "NoSpoofing",
  "version": "1.2",
  "description": " A UI notification scheme alerts users that the emails they receive may be spoofing.",
  "icons": {
    "16": "nospoofing_icon.png",
    "32": "nospoofing_icon.png",
    "48": "nospoofing_icon.png",
    "128": "nospoofing_icon.png"
  },
  "browser_action": {
    "default_icon": "nospoofing_icon.png",
    "default_titile": "NoSpoofing"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "toggle-tags": {
      "suggested_key": {
        "default": "Alt+S",
        "mac": "MacCtrl+S"
      },
      "description": "Toggle Tags"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://mail.google.com/*",
        "https://mail.google.com/*"
      ],
      "js": [
        "js/jquery-1.11.0.min.js",
        "js/content-script.js",
        "js/jquery.popup.js"
      ],
      "css": [
        "css/custom.css"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "insert.js"
  ],
  "manifest_version": 2
}