The File Extensions Database

.SLT File Extension

  • Developer by: Mozilla
  • Category: Settings Files

What is an .SLT file?

.SLT is Mozilla User Profile Folder

Contains user profile data for Mozilla programs such as Firefox and Thunderbird; may include bookmarks, browsing history, and cached data; typically saved with a random filename, followed by the ".slt" extension.

In Windows Vista, the Firefox SLT folder is saved in the "Users\Profile\AppData\Roaming\Mozilla\Firefox\Profiles" directory. In Mac OS X, it is located in the "~/Library/Mozilla/Profiles/[profile name]/" directory.

Programs that open Mozilla User Profile Folder
Mozilla Firefox
Mozilla Thunderbird
Mozilla Firefox
Mozilla Thunderbird

How to solve problems with SLT files

  • Associate the SLT file extension with the correct application. On :
    Windows: Right click on any SLT file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.SLT files". Mac: Right click (or Ctrl-click) the SLT file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .SLT is Mozilla User Profile Folder. Because only the current version supports the latest SLT file format. Search, therefore, e.g. on the Mozilla manufacturer website after an available .SLT is Mozilla User Profile Folder update.
  • To make sure that your SLT file is not corrupted or virus-infected, get the file again and scan it with antivirus software.