Full changelog: https://github.com/Aris-t2/CustomCSSforFx/commits/master
[General]
- Fx71+: support for 'about:config > layout.css.xul-box-display-values.survive-blockification.enabled > false'
- this fixes most options, that use position fixed/absolute rules
[Appbutton]
- (workaround) Fx71+: additional 'options' to support 'appbutton in titlebar'
[Add-on Manager (about:addons)]
- (fix) Fx70+: add-ons manager > alternative appearance