| 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 United States, 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.
 | Apache Web Server by Apache HTTP Project Management Committee |
 | Minecraft by Mojang |
 | Mozilla Firefox by Mozilla |
 | 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 |
|---|---|---|---|
| .JPF | Joint Photographic Experts Group | Raster Image Files | JPEG 2000 Image |
| .BOK | Pearson | Data Files | TestGen Testbank File |
| .CFM | Adobe Systems Incorporated | Web Files | ColdFusion Markup File |
| .CER | Microsoft Corporation | Web Files | Internet Security Certificate |
| .EXTRA | Uncommon Files | Google BreakPad Crash Log Extra File | |
| .ASHX | Microsoft Corporation | Web Files | ASP.NET Web Handler File |
| .JPEG | Joint Photographic Experts Group | Raster Image Files | JPEG Image |
| .SHTML | Sublime HQ Pty Ltd | Web Files | Server Side Include HTML File |
| .BML | Various Developers | Web Files | Bean Markup Language File |
| .QRM | Armangil Software | Web Files | Qworum Message File |
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