I now consider this add-on all but abandoned. To be fair, it does technically work as described, namely for those that want to implement their own small custom personal scripts. The issue is that the plugin is completely tied into their userstyles site, which has been absolutely crippled for years. It is near impossible to get the pages to load, and without that ability there is no way to find and download professional themes, or access support materials. Do yourself the favor and choose an option with developers that take pride in ownership over the quality of their work.

Good for themes, but everything is SO SLOW. the extension itself would NEVER load themes when you click on it for the GUI to appear. The website is so slow it just gets 504 timeout errors. The servers are impossibly slow and this extension is only usable when you finish waiting.

Жутко виснет оф сайт разработчика, не удобно настраивать шкурки сайтов

Cool idea, but every theme is anime, it's not easy to filter them out, and the website you use to browse the themes is slow as molasses.

It's buggy and hardly works

it works but the website is incredibly slow please fix it it takes like 10 minutes to load the site and it always gives bad gateway errors

all of its webpages load super slow and when i click to install a theme it just loads forever

Works great, but uses WAY too many resources. My laptop's battery drains very quickly and the CPU usage is always high whenever Firefox is open. The moment I uninstalled this extension, the CPU usage dropped back to normal. Will reinstall once something is done about this.

One of the few addons I would ever stick to my collection, ever since upgrading to Firefox Quantum 60+ has been reporting database errors. It is otherwise unusable and the troubleshoots I have attempted provided no solution.

Meanwhile, I'm relying on anti-strain droplets from my pharmacy to aid me in reducing visual stress.

Update deleted my styles and is completely broken in my older version of FF. What happened to version compatibility checking before update?

The new CSSLint feature is beyond annoying and looks stupid. It shows warning like "Don't use IDs in selectors." and "Use of !important". How is it possible to change the style without using "!important"?

There should be a way to disable it or fine tune those warnings. Or better, just completely remove it and save some CPU resources and developers' brain cells.

As opposed to other styling plugins, this one does not apply rules that aren't marked with !important correctly, making it harder to create styles or breaking existing ones.

Stylish was the original add-on for restyling the web and it did so well for many years... Sadly, since Firefox was nerfed in version 57, things have taken a turn for the worse.

On initial update, it completely failed to port over any of my styles, and just presented me with a page saying "Oh yeah, we couldn't port these... Please do it yourself" despite Stylish having the functionality to import moz-format stylesheets. I had to copy-paste to manually import my two-dozen styles and I wasn't happy. Now in version 58 it's done it again... This is awful, and I have to try switching to Stylus to see if that's any better.

The toolbar UI also attempts to show a giant preview for every style, including ones that weren't installed from userstyles.org, so they just waste space so you can only see two at a time. All I want is a simple list showing me all relevant styles, and the ability to toggle and edit them.

Overall, I'm very disappointed in how Stylish has been treated since it was taken over by this so-called "SimilarWeb Ltd" which appears to simply be an analytics company.

Was working perfectly until today the extension is not at all recognized by the https://userstyles.org site and neither is the icon showing up properly in the toolbar.

Reinstalling doesn't help.

A potentially useful extension, with many possibilites---all of which, unfortunately, are useless due to absolutely NO instructions.

How a developer expects anyone other than advanced 'power users' to somehow magically learn the use of their programs is beyond me. It is, however, how more than 99.99% of apps, programs, and extensions are released these days.

Totally frustrating, especially when a page of basic assumptions, instructions and examples would demystify this extension's use for most people.

Opaque and unworkable.

1. More users should be aware of the data collection behavior of Stylish. It’s sneaky to enable that without notifying user with changelog. I don’t mind tracking and ads, but I do want to get informed.
2. You lose user if you don’t allow them to opt out.
3. You don’t even respond to negative reviews.

Stylus is really much better. They at least fix bugs.

Not giving one-star because the developer (now company) still hosts User Styles, a good distribution site for styles. But this add-on itself deserves no star.

Since this tool is not opensource I do not recomment to use. Some users claims it has trackers. There is open alternaives (search 'Stylus', etc.)

I´ve read in the stylish forum that "As far as we know, no WebExtensions-based extension can restyle the browser user interface, only web pages. To restyle the interface, a userChrome.css file will be required. http://kb.mozillazine.org/UserChrome.css" https://forum.userstyles.org/discussion/58456/firefox-version-for-57-and-beyond.
If this is so, all the topics that modified the interface of mozilla and that can not be recovered from the previous version are not really useful at all?

Not support firefox for Android

I have always hated how Stylish looked on Google Chrome. I really liked the old look on Firefox, it was simple, compact and fast. It allowed to preview styles without saving them.