crystal remix is a linux icon pack - i've used it for a while on kde, but as of this version it officially supports various other DEs as well
(not my work, i just like it)
blog post with release info
crystal icons release page
crystal dock release page
how the hell did i use reddit for almost a decade and not know about that feature
it wasn't your poor explanation, it was just me being an idiot i think - i just assumed it was new
that's weird. it's actually a pretty useful feature, but it's odd they'd add it to old reddit before new reddit, considering it's basically deprecated. maybe it's just an a/b rollout and i don't have it yet
i have old.reddit as default as well, but i'm not logged in on my phone browser and it wouldn't open in my app
just fyi, your link is broken for me
i wonder if it's a new url scheme, as i've never seen duplicates in a reddit url before, and if i switch it out for comments it works fine
just search your package manager for oxygen (it's called a different thing in every distro)
you'll want the icons (oxygen-icon-theme or similar), decorations (oxygen-window-decorations), and widget theme (oxygen-qt-theme). there might also be a meta package called kde-oxygen-theme or something with all 3
it only works on qt apps though, and the gtk oxygen theme is long abandoned
it can still look like this!
the oxygen theme still works fine on plasma 5 (and supports dark colourschemes)