Effective simplicity!
Just for solving the (ie, my personal) essential necessity of a visible scrollbar, I gave it 5*s, option to customize colours add an extra plus: ⭐⭐⭐⭐⭐➕.

It helps a lot at some websites, where I have problems in finding the current position of scrollbar. I set colors to higher contrast and always can see it.

Funciona, puedes cambiar tanto el fondo de la barra como la barra movible con cuaqluier color que quieras.

Nice! Should be included by default in Firefox.

Всё круто спасибо ☺️

Addon worked perfectly. Simple to use and the dev is active on the reviews page willing to help anyone with issues! I recommend this addon!

When will you add other language versions? I have made Polish translation on Crowding.