Examine source code of Knower

{
  "manifest_version": 2,
  "name": "knower - 你的知识助手",
  "description": "保存文章到knower, 自动进行知识识别、分类、标引、整理、分析、聚合。",
  "version": "2.3.5",
  "homepage_url": "https://knower.info/",
  "author": "Memexcocn",
  "background": {
    "scripts": [
      "js/background.bundle.js"
    ]
  },
  "permissions": [
    "activeTab",
    "menus",
    "tabs",
    "cookies",
    "webRequest",
    "http://*/*",
    "https://*/*",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": {
      "16": "images/browser-action-icon-16.png",
      "32": "images/browser-action-icon-32.png"
    },
    "default_title": "knower - 你的知识助手"
  },
  "content_scripts": [
    {
      "matches": [
        "*://knower.info/extension_login_success"
      ],
      "js": [
        "js/login.bundle.js"
      ]
    },
    {
      "matches": [
        "*://knower.info/*"
      ],
      "js": [
        "js/receiver.bundle.js"
      ]
    },
    {
      "matches": [
        "*://*.baidu.com/*",
        "*://*.so.com/*",
        "*://*.google.com.hk/*",
        "*://*.google.com/*",
        "*://*.bing.com/*",
        "*://*.sogou.com/*"
      ],
      "js": [
        "js/wsmwu.bundle.js",
        "icons/iconfont.js"
      ],
      "css": [
        "css/wsmwu.bundle.css"
      ]
    }
  ],
  "icons": {
    "48": "images/icon-48.png",
    "96": "images/icon-96.png"
  },
  "web_accessible_resources": [
    "save.html",
    "images/knower-logo.png"
  ]
}