Stylish site never loads. Just a spinning color wheel forever. It's not Stylus's fault, but since it's an integral piece of what this add on does, it's just not that useful anymore.

感觉还行，就是不会用

when i want to open editor in a new window-it does not show !!! I only get the name in the taskbar but with no window and no style...please fix it or help me .

Sadly, Stylus (without having any styles loaded) messed up my zimbra-webmail and I cannot use it anymore.
Other than that I was generally happy with it. Silently pushing DOM-manipulation is not appreciated, however.

基本的には良いんですがFirefoxだけこの拡張機能有効にしてると少しパフォーマンスが落ちます
Chromeはパフォーマンスに影響しないのですが。。。

Need to be able to easily make rules for sites. For example, I can't set it to use a theme globally but then disable that theme and/or use another one on specific sites. I've yet to find a theme that looks good everywhere, so the ability to customize per domain, and even per page, is a necessity.

UI is very poor in Firefox Quantum

Does not work on Firefox 56 for Android.

I am getting "This add-on requires a newer version of Firefox (at least version 55.0). You are using Firefox 52.0." But I am actually using Firefox 57.0! What sorcery is this?

Edit:

I downloaded version 1.1.4.2 of Stylus and was then able to update to version 1.5 from Firefox's add-on manager. Stylus add-on page still says my version of Firefox is 52.0, though.