The Whois® One-Click DNS add-on for Firefox provides a faster and evSSL secured(HTTPS) alternative for searching the DNS records of a given domain(e.g. mozilla.org).
Once the DNS lookup has completed you can also share your query result by posting the result to Twitter with a t.co shortened url.
The Whois® One-Click DNS Lookup add-on supports DNS lookups on A Records, NS(NameServer) Records and MX(Mail Exchanger) records.
Note: Once you've landed on the evSSL secured result page for your query, you can perform additional advanced DNS searches on SOA, TXT, AAAA, and AXFR records directly from the browser.