AI 产品解读Bridge extension enabling electronic digital signatures on the Japanese local tax portal eLTAX PCdesk (WEB版) by connecting the web application to a native PKI application via Chrome Native Messaging
The eLTAX web-based tax filing portal needs to apply digital certificate signatures to tax submissions, but browsers cannot directly access local certificate stores or PKI hardware. This extension solves this by relaying signature requests from the eLTAX web page to a locally installed native application (jp.eltax.elpki) that can access digital certificates and perform cryptographic signing.
1. User navigates to eLTAX portal (portal.eltax.lta.go.jp) and logs in. 2. Content script injects version detection elements so the portal knows the extension is installed. 3. When the user initiates a tax filing requiring electronic signature, the portal dispatches a 'launchElpki' custom DOM event. 4. Content script receives this event and sends it to the background script via chrome.runtime.sendMessage. 5. Background script connects to native messaging host 'jp.eltax.elpki' and forwards the request. 6. Native app performs the digital signature operation using local certificates. 7. Response flows back: native host → background → content script → portal via 'recvElpkiMsg' event. 8. On page unload, the extension sends a close message to cleanly terminate the native app connection.
Detects extension installation and version from the eLTAX web page via injected hidden DOM elementsRelays 'launchElpki' custom events from eLTAX web page to native messaging host (jp.eltax.elpki)Returns native host responses back to the web page via 'recvElpkiMsg' custom eventsHandles connection cleanup when the user leaves the page (beforeunload)Supports both Windows and macOS with platform-specific error codes
- 目标用户
- Japanese municipalities and businesses filing local taxes through the eLTAX system / Tax accountants and administrative staff using eLTAX PCdesk WEB version
- Chrome Web Store detail was unavailable (API error), so store description/rating/screenshots could not be reviewed
- The native messaging host application (jp.eltax.elpki) is not included in the extension package and its behavior is inferred from message patterns
付费分析未识别到付费功能
No payment, subscription, upgrade, or billing code exists in the extension. The extension is a simple native messaging bridge for the eLTAX government tax portal, which is a free public government service. No premium features, paywalls, or licensing checks are present in any source file.
- 置信度
- 95
- 支付平台
- --
- 来源
- AI / 高
- 需要登录
- 是
- 登录理由
- The extension is a helper for the eLTAX (地方税ポータルシステム) government tax portal. The eLTAX PCdesk web system requires user authentication to file local taxes. While the extension itself has no login UI, it only activates on eLTAX portal domains (manifest.json line 19), and the destination service requires a registered municipal account and login to use. The extension cannot fulfill its core purpose (applying electronic signatures to tax filings) without the user being logged into eLTAX.
