Mozilla Firefox XUL fastload data
File type: Source code and script file
An mfl file extension is related to Mozilla Firefox and Mozilla Thunderbird software. An mfl file stores fastload data in XUL (XML User Interface Language).
Found 3 different file type records with the same mfl filename suffix.
File type category:
Source code and script file
Date updated: June 27, 2025
The mfl file extension is associated with early Mozilla Firefox and Thunderbird releases.
The mfl file contains pre-compiled JavaScript that is used to speed up some operations, like reduce loading time of skins for example. Probably a little obsolete format.
The mfl files are used for internal purposes of Firefox and Thunderbird.
Software applications that handle other tasks involving mfl files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
File type category:
Various data file
Date updated: January 22, 2019
The mfl file extension is associated with the MADRIX, a light effects management and lightning control software for Microsoft Windows operating system.
The mfl file stores list of fixtures generated after MADRIX update.
Use MADRIX to open *.mfl fixture library files.
Probably cannot be converted to other formats.
File type category:
Various data file
Date updated: October 2, 2026
ModFit LT, developed by Verity Software House, is used to analyze DNA content and cell-cycle data, including difficult DNA patterns. An mfl file stores an analysis report generated by the software.
ModFit LT is available for Microsoft Windows and OS X, and the format is intended to be used within that software.
Open an mfl file with ModFit LT. Use the program's Open command to load the report.
Other applications may not correctly interpret the report because it is a ModFit LT-specific file.
Open the mfl file in ModFit LT and use the program's reporting or printing functions to create a copy in a more widely supported form, if required.
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