removing old firefox ESR releases?

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

The current firefox ESR release is 60.7.0, in www/firefox60.

We still have lots of older versions:

www/firefox36
www/firefox45
www/firefox52

Is anyone still using any of these, and if yes, why?

Please speak up; if noone does, I'll remove them.
(No security fixes are applied to them.) 

Cheers,
 Thomas