Скрипт содержимого расширения Chrome не работает в Gmail

{
  "name": "name",
  "version": "1.0",
  "description": "description",
  "permissions": [
    "activeTab",
    "tabs",
    "*://mail.google.com/*",
    "declarativeContent",
    "storage",
    "contentSettings"
  ],
  "background": {
    "scripts": ["js/send.js"],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "images/imagege1.png",
    }
  },
  "icons": {
    "16": "images/image1.png",
  },
  "web_accessible_resources": [
    "css/bootstrap.min.css",
    "js/jquery-3.3.1.slim.min.js",
    "js/popper.min.js",
    "js/bootstrap.min.js"
  ],
  "content_scripts": [{
    "matches": [
      "*://mail.google.co.in/*",
    ],
    "css": [
      "css/bootstrap.min.css"
    ],
    "js": [
      "js/jquery-3.3.1.slim.min.js",
      "js/bootstrap.js",
      "js/send.js",
      "js/bootstrap.min.js"
    ],
    "run_at": "document_end",
    "all_frames": true
  }],
  "manifest_version": 2
}