You can find the full installer of the current Firefox release (113.0.2) in all languages and all operating systems here: *https://www.mozilla.org/en-US/firefox/all/#product-desktop-release *https://www.mozilla.org/en-US/firefox/113.0.2/releasenotes/ It is possible that (anti-virus) security software is causing the problem. Try to disable security software temporarily to see if that makes a difference. Boot the computer in Windows Safe Mode with network support to see if that has effect. *[https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/] *[https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10/]