DNS Forge: NextDNS Firefox Add-on

Manifest V3 WebExtension, Real-Time Server-Sent Events (SSE) Stream Parsing & Automated Blocklist Correlation

Architectural Summary

Modern privacy-focused web browsing requires dynamic, fine-grained control over DNS-over-HTTPS (DoH) routing and real-time blocklist auditing. DNS Forge is a modular Firefox WebExtension built to interface directly with NextDNS APIs, providing real-time Server-Sent Events (SSE) log streaming, blocklist correlation, automated security rule auditing, and multi-profile synchronization.

graph TD
    A[Browser Navigation Event] --> B[Firefox WebExtension Runtime]
    
    subgraph Extension Core
        B <--> C[SSE Log Stream Parser<br><i>Real-Time Zero-Latency</i>]
        B <--> D[Blocklist Correlator<br><i>Identifies Triggering Rule</i>]
        B <--> E[Profile Mirror Sync Engine<br><i>NextDNS REST API</i>]
    end

    subgraph Security & Policy Engine
        C --> F[NextDNS Cloud Gateway]
        E --> F
        F --> G[Custom Security Profiles<br><i>Cryptojacking, C2, Trackers</i>]
    end

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1. Key Technical Features

1. Zero-Latency SSE Log Streaming:

   • Uses native EventSource connections to stream live DNS queries with sub-millisecond DOM updates.
   • Renders query protocols (DoH, DoQ, IPv6), client IP geolocations, and domain categorization badges.

2. Real-Time Blocklist Debugger:

   • When a website breaks, instantly correlates the blocked asset with the exact active security list (e.g. OISD, Steven Black, NextDNS Threat Intelligence) allowing single-click allowlisting.

3. 100% Mozilla AMO Compliance:

   • Strictly adheres to Firefox Manifest V3 security boundaries with zero unvetted third-party dependencies, clean Content Security Policy (CSP), and automated CodeQL audit pipelines.

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