Examine source code of Cage Access Guard

{
  "manifest_version": 3,
  "name": "Cage Access Guard",
  "version": "0.1.11",
  "description": "Enterprise extension that enforces access restrictions on Upwork, Freelancer, and PeoplePerHour to protect business accounts from unauthorized changes.",
  "author": "ZS Tech Labs",
  "homepage_url": "https://cage-access.zstechlabs.com/",
  "developer": {
    "name": "ZS Tech Labs",
    "url": "https://cage-access.zstechlabs.com/"
  },
  "permissions": [
    "tabs",
    "storage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "https://*.upwork.com/*",
    "https://*.freelancer.com/*",
    "https://*.peopleperhour.com/*"
  ],
  "background": {
    "scripts": [
      "background.firefox.js"
    ]
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Cage Access Guard",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.upwork.com/*",
        "https://*.freelancer.com/*",
        "https://*.peopleperhour.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a4c2d0f9-7f9a-4b52-8b2c-1b6d1a3d6c27}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteActivity"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}