fix: remove nav border after firefox 122.0 upgrade

[eggnog-plus]

OS: Ubuntu 22.04.3 LTS
Version 122.0 64-bit (Standard)

The most recent Firefox upgrade added this thin border to the top of the window:

This change removes it:

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Great project! Thanks for hosting it.

[rockofox]

Hmm, I tried reproducing this both on NixOS + Firefox 122 and macOS + Firefox 123/Dev, but I didn't run into the issue.

What theme are you using in Firefox? Maybe it's somehow related to that

[eggnog-plus]

Ah, it might be the desktop environment. Just like you, I don't see anything using Gnome. I typically use i3 without a desktop environment, which is when I see the border.

[rockofox]

Hmm, weird, I tried it out on i3 default configuration with no desktop environment and still can't see any border

[eggnog-plus]

I think this pixel row in your screenshot could be the border I'm seeing. See if it's still there when only one Firefox tab is open (making the tab row disappear).

I was able to reproduce with a fresh Ubuntu Server 22.04.3 install and apt install i3 xinit firefox. Then I installed lightdm too and noticed that the border changes color when I updated the desktop appearance back and forth between Light and Dark.