It's a good alternative to Stylish. Just because it's opensource.

Does not seem to work with containerized sites. FF57 with Mozilla's own Multi-Account Containers extension. Otherwise, thanks for the effort.

EDIT: Works when following workaround on github, although this way is rather primitive.

Better than the alternative "Stylish".

The other add-on "Stylish" collects user-data (logging every website you visit) and sells it. STYLUS DOES NOT DO THIS.

Stylus is Open Source -- and people have confirmed that Stylus does not collect user data.

Stylus devs add new features and fix bugs within 1-2 days. They are VERY active with this add-on -- just look at the dates on the revision history!

And the devs actually care about Privacy! I suggested a feature and the Devs were resilient about not making network requests without the user knowing:

From a Dev:

> Don't emit any outgoing requests without an explicit user action such as clicking on the search link. This is what Stylish does. We don't. Ever.

This shows they really care about your privacy.

<333

if a website fully loads on background styles are not loaded at all on firefox 57.0.2 refresh brings it back.

Open a website that has style
Middle click a link
Let it fully loaded
Switch to new tab
Style not loaded
Refresh
Styles are back

edit: as ver1.1.7.8 seems fixed thanks for fast feedback

С последним обновлением испортили расширения для мозилы откатите обратно вот скрин https://cdn1.savepice.ru/uploads/2017/12/9/897625dd634d7c5c1c4ffaf1447ef532-full.png

Вот спасибо! Всё чудесно работает. Стили легко и просто импортировались из .json файла. А то я поставила новый Stylish, а он мне браузер повесил намертво, даже комп из-за него подзавис, минут 15 его реанимировала.

Хорошо, работает куда лучше сегодняшнего Stylish, не замедляет работу, сразу применяется, и легко пользоваться.

More reliable and better performance than Stylish.

クソ以外の何物でも無い。
今まで設定していたユーザーCSSが全然効かないうえに、再度管理画面から中身をチェックしたら、コードが消えてるじゃねえか。
欠陥品も良いとこだ。

Add↓

Screenshot　→　http://or2.mobi/index.php?mode=image&file=186872.png

Works well but it needs to be integrated with userstyles page. something like additional button or clicking "install on stylish" will add it to stylus.

Edit: t could be another addon interfering? Yes. Stylus. but with new version I am facing less issues. Git is bookmarked.

管理画面が開けるようになった。
thx

All is well, but there is one but a drawback.
I noticed that when I go to the page youtube it freezes, it can get wrong that the page does not respond.
waiting for fixation

Awesome!

57.0へのアップデート後、使いにくくなったStylishを止めて、このStylusを使用した。以前のStylish同様の機能を持ちながら、それ以上の使いやすさを実現している。もうStylishに戻ることはないだろう。

各種項目は日本語化され、内容は適切でわかりやすい。特に、何か期待する動作と違うことになりそうなとき、その理由が表示されるのがとても良い。次に何をすればいいのか一目瞭然だからだ。

Stylusは、ユーザーCSSを駆使する人たちにとってより良い選択となるだろう。

The UI is kind of ugly and some options are not entirely clear, but it does the job. Thanks! Would be awesome if you guys could lobby Firefox for an API to change userChrome.css via Stylus.

New to all this. Tried installing Stylish 3 on FF 57. Install repeatedly fails with database error, and could not find any way to resolve this.
Installed Stylus, install went perfectly, created a new theme using CSS copied from userstyles.org. Worked perfectly first time. Excellent so far!