Fixes a small issue for Firefox 115.40.0esr (Part II)

Sascha Eggenbergerrequested to merge
firefox-esr-fix-round-2 into master

What does this MR do and why?

Fixes a small issue for Firefox 115.40.0esr (Part II)

This is a follow-up to Fixes a small issue for Firefox 115.4.0esr (!253919 - merged)

tl;dr: Adds an :empty fallback for a recently released esr 115.x verison even we don't support it anymore.

The first MR did fix the problem, however Firefox drops the selector as we chained it together with the "unknown" selector which this version of Firefox cannot handle and therefore it drops the selector completely when rendering and it never applies.

References

Screenshots or screen recordings

Before After
before after

How to set up and validate locally

  1. Open Firefox 115.40.0esr (I tested through Browserstack on Win7)

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Closes #627827 (closed)

Edited by Sascha Eggenberger

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