cascade VS elementaryos-firefox-theme

The FirefoxCSS community has a bunch of mods that are easy to install and you can make it super minimal (I haven't found a comparable "single tab" one, but here's a mod that's super clean and minimal: https://github.com/andreasgrafen/cascade)

Lepton, Firefox-GX, SimpleFox, Cascade

I would suggest cascade https://github.com/andreasgrafen/cascade

When most people hear the word themes they probably think of these. Some people might have even made their own themes using the Firefox Color add-on (shameless plug). However, css themes allow for much, much, much, much, much, much, much more customisation and tweaking.

I'm a big fan of andreasgrafen's Cascade theme, but I wanted to tweak it to use the exact dark mode colours from Apple's design guidelines for macOS Big Sur.

I've just pushed an alternative config file that should be closer to the experience that Waterfall offers by default. c:

In the screenshot below, I'm rockin' a one liner theme called: [Cascade](https://github.com/andreasgrafen/cascade) (Similar to [SimpleFox](https://github.com/migueravila/SimpleFox)). Oh, I use a̶r̶c̶h̶ artix linux btw (BSPWM) so I don't have a window frame on any of my applications. This makes the theme fit even better. Though, I must say, the following questions pertain to Firefox in-general and are not theme specific questions.

for the theming in Firefox i currently use https://github.com/Zonnev/elementaryos-firefox-theme/tree/elementaryos-firefox-theme but I sometimes switch back to standard look ...in combination with tweaks it adapts the dark mode (the ubuntu repo firefox installed with apt)

You can try this Firefox theme for a better integration :)

I installed this theme: https://github.com/Zonnev/elementaryos-firefox-theme/tree/elementaryos-odin-firefox-theme

Yeah, this triggers me too. I remember having the same problem on KDE though, so it's most likely a Firefox thing. You can use this custom eOS theme for Firefox if it's bothering you enough GitHub - Zonnev/elementaryos-firefox-theme: This theme for Firefox supports all the window buttons layouts from Tweaks and it blends into the elementary OS user interface.

As in the title, I have weird black boxes behind the modals (e.g. bookmarks on the screenshot above) on Firefox. Initially I thought it was related to custom theme but after removing it and reverting toolkit.legacyUserProfileCustomizations.stylesheets, problem still exists. Any idea how to fix it?

By default no but thanks to the zonnev we have this: https://github.com/Zonnev/elementaryos-firefox-theme

If you are running the early builds of eOS 6 Odin you can install Firefox in there and add my theme for Odin. It's not recommended to install the Odin theme in eOS Hera since it won't look good because of double window borders and larger rounded window corners. For some reason in eOS 6 Odin, Firefox doesn't get window borders, so I added them manually with the style sheet.

This is a tweak of the original theme by Zonnev. I'm still working on some details, then I'll put the userChrome on Github as well.