In the recently released Firefox 73.0 stable update, Mozilla introduced two new accessibility features. However, on devices equipped with 0patch or G Data Internet Security 2020 third-party software, firefox browser startup crashes. This issue has been fixed in today’s firefox 73.0.1 update.
Mozilla Firefox 73.0.1 Update Log
Fixes a crash on Windows devices with third-party security software installed (e.g. 0Patch or G Data) (bug 1610790)
Fixes an issue where browser functionality is lost in certain situations, such as running in Windows-compatible mode or with custom anti-exploit settings
Fixed issues connected to RBC’s Royal Bank website
Fixes an issue where Firefox accidentally exited when it exited print preview mode
Fixes an issue that crashes when playing encrypted content on some Linux systems
Download address: https://ftp.mozilla.org/pub/firefox/releases/73.0.1/