this post was submitted on 23 Aug 2026
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[–] QuadratureSurfer@piefed.social 2 points 3 days ago (2 children)

Lemmy might not support this, but PieFed does (without the need for a browser extension). There are some instructions here on setting it up:
https://codeberg.org/rimu/pyfedi/src/branch/main/docs/developer_docs/09_Theming_Guide.md

The custom CSS/JS/Jinja needs to be submitted and approved first, but then a moderator could add it to the community as the official theme.

[–] Pamasich@kbin.earth 3 points 2 days ago

Mbin also supports it, and without needing approval.

Though it's not currently being federated, is that the same or different on Piefed?

[–] mschae@lemmy.today 3 points 3 days ago* (last edited 3 days ago)

Thank you for sharing, I wasn't aware of this feature. But to be fair, PieFed has it easier here because it has a ‘main’ frontend (unlike lemmy, where all frontends are third-party as far as the main software is concerned) that you can apply styling to. Even then, it can only work on that main frontend and not any alternate clients.

I really need to follow PieFed more closely, to be honest. It has so much stuff…

edit: actually, I just noticed this:

The custom CSS/JS/Jinja needs to be submitted and approved first, but then a moderator could add it to the community as the official theme.

So I assume an admin has to add it as a possible theme first, right? If that's good enough, I guess something similar could be done in mlmym too. mlmym should already be very easy to style; it doesn't have a skins/themes mechanism, but that's nothing that couldn't be added.

I think I'm still favorable to the addon approach because it would mean that the custom style could work across every mlmym installation without needing admin involvement, but a theme system is also a reasonable compromise.