Initial release of DigInterface Tools for Firefox.

Features:
- DNS Lookup — query A, AAAA, MX, NS, CNAME, TXT, SOA, PTR, SRV, CAA, SPF, DKIM, and DMARC records
- Email Header Analyser — SPF/DKIM/DMARC/ARC authentication results and relay hop timing
- SSL Checker — certificate expiry, issuer, SANs, and TLS version
- Blacklist Checker — check against 15+ major DNSBL/RBL lists
- WHOIS Lookup — domain or IP/ASN ownership details
- SPF Expander — flatten an SPF record into its resolved IP ranges
- DNS Propagation — check propagation across public resolvers worldwide
- Right-click integration — look up selected text, a link's target domain, or the current page's domain directly from the context menu

Requires a free DigInterface account and API key, generated from your account dashboard.