Classic CSS tweaks for Firefox Quantum v3.1.8

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

[GENERAL]

• (userChrome.css) changed, added and moved some descriptions

[Buttons]

• (tweak) custom icons

[Appbutton]

• (tweak) popup menu > more icons (thx to Jee-Hex)

[General UI]

• (new) Fx84+: findbar on top (findbar is not on top of the web content anymore)
• (new) Fx84+: findbar on top > close button at findbars start
• (new) top notification > old size (thx to Jee-Hex)
• (fix) Fx81+: menupopup with scrollbars

[Tabs]

• (tweak) 'tabs below navigation toolbar'

[Toolbars]

• (new) compatibility option for 'simulated add-on bar' + 'tabs on bottom'

[Mega Bar]

• (tweak) mega bar popup > hide 'Search with...' and 'Visit...' results (thx to 2BeeOrNot)

[Add-on Manager (about:addons)]

• (new) add-ons manager > old add-on badge size (thanks to Jee-Hex)
• (tweak) Fx75+: alternative appearance Aero