Root certificate expiring - anything to be done?

[zoltan]

Not sure if this is the right place to put this but Firefox has been opening with stark warnings about root certificates expiring on old older versions on Jan 14 and claiming that it will cause "some preferences and other features to stop working" and that some websites and add-ons will break. I've used older versions of FF for years without any problems, but now suddenly this? Is it really different this time? If so, is there anything I can do about it if I want to keep running an older version?

On this PC I'm still running Win 7 flawlessly, but you can't go past FF version 115 with that OS anyway.