Examine source code of DSP Browser Security

{
  "name": "DSP Browser Security",
  "manifest_version": 2,
  "version": "1.0",
  "description": "Manage Mozilla Firefox using DSP Browser Security extension",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "author": "dhanush.ld@zohocorp.com",
  "homepage_url": "https://www.manageengine.com/data-security/",
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "DSP Browser Security"
  },
  "background": {
    "scripts": [
      "javascript/historyTracker.js",
      "javascript/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "javascript/contentParser.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "management",
    "webRequest",
    "<all_urls>",
    "nativeMessaging",
    "privacy",
    "downloads"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{92513756-46b2-4b9d-a457-dc4a71f75d20}"
    }
  }
}