Examine source code of Securly Plus

{
  "manifest_version": 3,
  "name": "Securly Plus",
  "description": "Dark mode and improvements for Securly Flex",
  "version": "4.0",
  "host_permissions": [
    "*://flex.securly.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://flex.securly.com/*"
      ],
      "js": [
        "isolated-content-script.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://flex.securly.com/*"
      ],
      "css": [
        "dark-mode.css"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "action": {
    "default_title": "Options"
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "securly-plus@noreply.kameswar.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}