| File Extension: | LOCK |
| File Type Description: | Lock File |
| File Type Developer: | Mozilla |
| Primary Associated Software: | Mozilla Firefox |
| Primary Software Developer: | Mozilla |
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Mozilla created the Lock File (LOCK) file for the Mozilla Firefox software series. Commonly, Lock File files are found on user computers from China, and on PCs running the Windows 10 operating system. A vast majority of these users are opting to use Google Chrome as their preferred internet browser.
 | Mozilla Firefox by Mozilla |
 | Apache Web Server by Apache HTTP Project Management Committee |
 | Minecraft by Mojang |
 | Microsoft OneDrive by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | iOS |
 | Android |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .CAL | Newera Software Technology, Inc. | Raster Image Files | CALS Raster File |
| .TBL | Blizzard Entertainment Inc. | Data Files | StarCraft Information Table |
| .JPG | Joint Photographic Experts Group | Raster Image Files | JPEG Image |
| .MAB | Mozilla | Uncommon Files | Mozilla Address Book |
| .12 | IBM | Data Files | IBM Voice Type Languages Scripts Data File |
| .JSB | Freedom Scientific | Developer Files | JAWS Script Binary File |
| .MOZ | Mozilla | Web Files | Mozilla Cache File |
| .HTML | Various Developers | Web Files | Hypertext Markup Language File |
| .MSPX | Microsoft Corporation | Web Files | Microsoft ASP.NET Web Page |
| .DML | Sybase, Inc | Web Files | DynaScript File |
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