Examine source code of Sidenote: AI Reading Assistant with Citations

{
  "manifest_version": 3,
  "name": "Sidenote: AI Reading Assistant with Citations",
  "short_name": "Sidenote",
  "description": "AI reading assistant — summarise, chat & explain PDFs, Docs, Notion, SharePoint & more, with citations that highlight the source.",
  "version": "2.12.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "sidenote@getsidenote.app",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "personallyIdentifyingInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "action": {
    "default_title": "Open Sidenote"
  },
  "sidebar_action": {
    "default_title": "Sidenote",
    "default_panel": "src/sidebar/index.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    },
    "open_at_install": false
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+Shift+S"
      },
      "description": "Open Sidenote"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "contextMenus",
    "storage",
    "activeTab",
    "tabs",
    "cookies",
    "downloads",
    "scripting",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}