Important: All users who have cyberfox 46.0.2 installed DON'T UNINSTALL the browser, We are very sorry but there is a CRITICAL issue with change set for "Generate RegisteredApplications registry key" during the uninstall process it may remove "RegisteredApplications registry key" causing an empty default programs list.
https://8pecxstudios.com/Forums/viewtopic.php?f=6&t=1476#p9732
Thanks for the warning, Hazelnut.
For a long time I have used a sort of a workaround that should prevent this sort of thing.
I use a portable browser, running in Sandboxie, running on a virtualized operating system.
I use Powershadow for win xp, also available are Returnil, Shadow Defender, maybe others.
No changes are made to the "real" system.
If a problem occurs in the sandbox, just shut the browser off and delete it.
If a problem occurs with the OS. just restart and its gone.
Ok, maybe everybody on earth knew about this, but maybe there is one newbie out there that didn't . . .