Examine source code of Tri-Language

{
  "manifest_version": 2,
  "name": "Tri-Language",
  "version": "2.0",
  "description": "Translate webpages between English, Nepali, and Tamang with live in-page translation.",
  "browser_action": {
    "default_popup": "index.html"
  },
  "icons": {
    "16": "icon.svg",
    "32": "icon.svg",
    "48": "icon.svg",
    "128": "icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "https://tmt.ilprl.ku.edu.np/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "dom.js",
        "content.js",
        "translate.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": []
      },
      "id": "{500c621a-9829-472c-a640-42f34eaa8d68}"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self' https://fonts.googleapis.com; font-src https://fonts.gstatic.com"
}