firefox-91plus-photon-userchrome VS firefox-csshacks

I am currently using this CSS

Because Mozilla removed that option from Firefox 91 ESR, which is what G4 is based on. You can get most of the UI back in the same way you would if you were using 91 ESR, with UserStyle modifications. Here's one project. And here is another.

I dunno, I tested that setup by applying all the styles in that repository and there is no space above tabs. Not in normal windows nor maximized windows, at least not on Win10 with 100% display scaling.

Here's my userChrome.css to revert to Photon: https://github.com/pellaeon/firefox-91plus-photon-userchrome

Not aware there was a "Mac version" of MrOtherGuy's 'tabs_on_bottom.css' userstyle... or are you using another userstyle from another author?

https://github.com/MrOtherGuy/firefox-csshacks/blob/master/chrome/autohide_toolbox.css (edited)

/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/tabs_on_bottom.css made available under Mozilla Public License v. 2.0 See the above repository for updates as well as full license text. */

I'm trying to create a flexible status text toolbar item like used to exist (here's an example from my current setup in Pale Moon), which I can place into the "status bar" that I created using MrOtherGuy's "fake status bar w bookmarkbar" code.

I can't figure out how to solve the issue even though I found a possible culprit, it might be related to the tabs full width code.

/* address bar on pop-ups - based on https://github.com/MrOtherGuy/firefox-csshacks/blob/master/chrome/show_toolbars_in_popup_windows.css */ :root[chromehidden~="toolbar"] :is( /* .browser-toolbar, */ #nav-bar, #urlbar-container, .chromeclass-toolbar-additional ) { display: flex !important; /* visibility: visible !important; */ }

You might want to check out styles that have been updated recently, like those.