Mork is a computer file format used by several email clients and web browsers produced by Netscape and Mozilla Foundation.
It was developed by David McCusker[1] with the aim of creating a minimal database replacement that would be reliable, flexible, and efficient, and use a file format close to plain text.
[1] The Mork format was used in most Mozilla-based projects, including the Mozilla browser suite, SeaMonkey, Firefox, and Thunderbird.
The file format has been severely criticized by Jamie Zawinski, a former Netscape engineer.
[4] In response, McCusker stated that the problems with Mork resulted from "conflicting requirements" and that he merely fixed scalability issues in bad code he "inherited".