Mork

Readable

database

Mork is a database file format that acts as part of the back-end to several email clients and web browsers produced originally by Netscape, and later the Mozilla Foundation.

Identify it

Extensions	`.mab.msf.dat`
Signatures	`2f2f203c212d2d203c6d64623a6d6f726b3a7a20` at byte 0 (Mork)
PRONOM	`fmt/612`
Wikidata	`Q6912474`

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Open it

Mozilla FirefoxOpen sourcereads · Mozilla Public License, version 2.0
Mozilla ThunderbirdOpen sourcereads · Mozilla Public License, version 2.0
PhotoRecOpen sourcereads · GNU General Public License
SeaMonkeyOpen sourcereads · GNU General Public License / GNU Lesser General Public License / Mozilla Public License

Convert it

No conversion recorded. One of the tools above may export it; search for a chain.

Sources

File Formats Wiki
PRONOM fmt/612
Wikidata Q6912474

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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