elementaryos-firefox-theme VS SimpleFox

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.

Lepton, Firefox-GX, SimpleFox, Cascade

for the theme : https://github.com/migueravila/SimpleFox

It'd be nice to see a single-line version of this that follows the aesthetic of SimpleFox.

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.

Slightly modded this setup just changed the colors and removed way more things, quite simple to replicate if you look at the SimpleFox repo

Do you mean this style?

I'm using a custom stylesheet: Cascade ( https://github.com/migueravila/SimpleFox). Text are dark and doesn't the color, the problem pertains even when the font doesn't change color in the "colors" tab. I tried using the stylesheet, but I didn't understand much and left it to its own devices.

Nah it's good, this one has a startpage made for it as well

Cascade is a Firefox Theme based on SimpleFox. This theme was known previously as "ag.proton"—but let's be honest: That sounds hella boring. What you get is a really simple one-line layout that works well with the new Proton UI.