Rated 5 out of 5 stars

Aris,很喜欢你的作品,等待你的更新或者新作品

Use custom CSS code for Firefox 57+ ( https://github.com/Aris-t2/CustomCSSforFx/issues/2 ) to keep classic ui features or switch to Waterfox browser ( https://www.waterfoxproject.org/ - a Firefox fork with support for legacy add-ons) to keep classic add-ons.