** NOTICE **
Don't use this abandoned project anymore. I read it has analytics tracking as well. Use the fork called Stylus instead: https://addons.mozilla.org/en-US/firefox/addon/styl-us/

TL;DR: ** Use STYLUS instead! **

I used to use this extension a long time ago. Unfortunately it looks like the website has been abandoned and left to rot. The © says 2021, but I suspect that's an automatically updated line. It feels like it's been updated since the last time I used it, but who knows how long ago that actually was.

The website is slow and sometimes crashes and times out. That's server side. Not Firefox. Small styles install, but if they're any more complex than a site skin, it takes too long to install and the longer it takes the more chance the site will crash before it's through.

I wish someone would take this whole thing and fork it into something someone has more passion for than the original authors do. Or let Mozilla Foundation bake it into Firefox.

Slow yes very very slow

slow mf

Like another user from NC *named NC* pointed out, while it does do as described it appears the site is all but abandoned. I just installed this extension for the second time, to see if it would perform any better and three minutes into attempting to access userstyles.org, it still hadn't loaded. It is as if someone has forgotten there has to be someone behind the scenes running the website or at least paying less than $4.00 a year to get it to run quickly, possibly smoothly. I do not recommend & suggest finding another extension that is similar where someone takes pride in it, ensuring it runs & is up to date.

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.

its very slow website

без включенного расширения нагрузка на процессор браузера около 3%,после включения 35-50

es muy buena aplicacion