Adaptec has been slow to release a 2.5″ external SATA enclosure compared to the major manufacturers relatively fast switch to almost exclusive use of SATA drives in laptops. My second choice would be Vantec’s version found at Newegg for $30.
The MHT plugin for Firefox only works in version 1.5. Its called MAF which stands for Mozilla Archive Format. Although Firefox is forcing users to upgrade, the programmers have been slow to keep MAF up to date so I am forced to use Internet Explorer for MHT.