Examine source code of Highlight Sync

{
  "manifest_version": 3,
  "name": "Highlight Sync",
  "version": "1.0.0",
  "description": "Free, privacy-first web highlighter with sync & review. Open-source Readwise alternative.",
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "alarms"
  ],
  "optional_permissions": [
    "identity"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "js": [
        "assets/index.ts-loader-6kVSXAXi.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "src/content/styles.css"
      ]
    }
  ],
  "action": {
    "default_popup": "src/popup/index.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "commands": {
    "highlight-selection": {
      "suggested_key": {
        "default": "Ctrl+Shift+H",
        "mac": "Command+Shift+H"
      },
      "description": "Highlight selected text"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'none';"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "assets/utils-BC7XP6ge.js",
        "assets/index.ts-30eKD8eS.js"
      ],
      "use_dynamic_url": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "highlight-sync@extension",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}