Examine source code of TextSnap: Share as Image

{
  "manifest_version": 2,
  "name": "TextSnap: Share as Image",
  "version": "1.0.0",
  "description": "Convert selected text into shareable images with QR code links. Note: Uses html2canvas.min.js which has known risks associated with innerHTML usage; this is a controlled usage.",
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "contextMenus",
    "downloads",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.js",
        "qrcode.min.js",
        "html2canvas.min.js",
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "qrcode.min.js",
    "html2canvas.min.js"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "textsnap@example.com",
      "strict_min_version": "58.0"
    }
  }
}