Only need for WATERFOX CLASSIC without using extension Polly.

Greasy Fork - Fix for problem with [datetime] / Waterfox Clasic [Standalone] v.1:
Read:
[Waterfox Classic] No Posted Time for Comments and others places

This userstyle try to fix it by CSS.

But you don't need it if you use the extension "Polly".
Read:
github more and more unusable - disappearing file listings [GitHub]

Same version in different places:
- Greasy Fork - Fix for problem with [datetime] for Waterfox Clasic [Standalone] (Userstyles.World - USw)
- Greasy Fork - Fix for problem with [datetime] - Useryles.org