Custom CSS tweaks for Firefox v4.3.1 + vX tests

This version might not fully support Firefox 102 ESR anymore.
Keep CustomCSSforFx v4.2.8 until ESR moves to the next major release.

Full changelog: https://github.com/Aris-t2/CustomCSSforFx/commits/

[GENERAL]

• (userChrome.css) minor description changes

[Tabs]

• (tweak) minor improvements and changes to photon tabs

[Toolbars]

• (fix) simulated add-on bar > status in add-on bar: text color
• (removed) simulated second bookmarks toolbar (duplicate): use addonbar_extra_bookmarks_toolbar_below_navbar.css instead

[about:addons]

• (fix) Fx109+: show buttons instead of popup
• (fix Firefox bug) alternative appearance: add-on inline options + zoom levels below 100%

v2 test
[about:preferences]

• (fix) Fx109+: preferences_alternative_appearance.css

v3 test
[Tabs]

• (tweak) minor improvements and changes to photon tabs
• (tweak) tab below navigation toolbar

v4-6 test
[Tabs]

• (tweak) minor improvements and changes to photon tabs

v7 test
[Tabs]

• (tweak) minor improvements and changes to photon tabs
• (tweak) classic squared tabs
• (tweak) classic squared tabs australized