Firefox 132 toolbar theming regression

[tazjin]

Hey! Love this theme, have been using it for quite a while. It's nice to have something that looks good and gets out of your way.

I just upgraded from Firefox 131 to 132, and there's a theming regression around the toolbar.

This is what it used to look like:

This is what it looks like in Firefox 132:

I don't know much about GTK styling and how to debug it, gonna dig into the Firefox changelog to see if there's any obvious candidates for what could be the reason ...