截至 2018 年底，Firefox 中现在提供有限的自定义！

As of late 2018, there is now limited customization available in Firefox!

查看这些答案:

• https://***.com/a/54101063/405015
• https://***.com/a/53739309/405015

这是背景信息:https://bugzilla.mozilla.org/show_bug.cgi?id=1460109

没有与 ::-webkit-scrollbar 和朋友等效的 Firefox.

There's no Firefox equivalent to ::-webkit-scrollbar and friends.

你必须坚持使用 JavaScript.

You'll have to stick with JavaScript.

很多人都喜欢这个功能，请参阅:https://bugzilla.mozilla.org/show_bug.cgi?id=77790

Plenty of people would like this feature, see: https://bugzilla.mozilla.org/show_bug.cgi?id=77790

就 JavaScript 替换而言，您可以尝试:

As far as JavaScript replacements go, you can try:

• https://github.com/mdbootstrap/perfect-scrollbar
• https://github.com/Grsmto/simplebar
• https://github.com/vitch/jScrollPane