Examine source code of SVG Export

{
  "name": "SVG Export",
  "short_name": "SVG Export",
  "description": "Download SVGs from websites as SVGs, PNGs or JPEGs",
  "version": "2.2.17",
  "manifest_version": 2,
  "icons": {
    "16": "icons/16x16.png",
    "19": "icons/19x19.png",
    "38": "icons/38x38.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "browser_action": {
    "default_title": "SVG Export"
  },
  "background": {
    "scripts": [
      "event.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'"
}