GMass: Powerful mail merge for Gmail

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "GMass: Powerful mail merge for Gmail",
  "version": "5.2.3",
  "description": "A powerful mass email and mail merge system for Gmail.",
  "short_name": "GMass",
  "icons": {
    "16": "GMass16.png",
    "48": "GMass48.png",
    "128": "GMass128.png"
  },
  "manifest_version": 2,
  "content_scripts": [
    {
      "js": [
        "inboxsdk.js",
        "gmassloader.js",
        "jquery.js",
        "jquery.bpopup.min.js",
        "select2.full.js",
        "selectize.js"
      ],
      "css": [
        "Gmass.css",
        "select2.css",
        "selectize.css",
        "custom.css"
      ],
      "matches": [
        "http://mail.google.com/*",
        "https://mail.google.com/*",
        "https://inbox.google.com/*",
        "http://inbox.google.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "https://www.gmass.co/",
    "http://www.gmass.co/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}