uc.css.js VS firefox-csshacks

I'm using this script which enchances the all tabs menu functionality of FF.

Woah, this is nicely packaged. Even has "Releases"! Thank you! https://github.com/aminomancer/uc.css.js

Yes. It is possible, but you will have to set up a JavaScript loader. See this GitHub page for more info. https://github.com/aminomancer/uc.css.js

UI customization is fortunately still alive in the wake of XUL extensions.

A /r/firefoxcss mod has a wonderful collection of code snippets that they maintain, which you can browse here: https://mrotherguy.github.io/firefox-csshacks/ and they created a userChrome.js loader here: https://github.com/MrOtherGuy/fx-autoconfig

My favorite customization repository is https://github.com/aminomancer/uc.css.js - which really tests the limits of what is and isn't possible with userChrome.css and .js. My favorite feature is the implementation vertical tabs, without the use of extensions.

Some legacy extensions are maintained and can be found here: https://github.com/xiaoxiaoflood/firefox-scripts/tree/master... (although you will need to use xiaoxiaoflood's userChrome.js loader AFAIK).

Honorable mention goes to the Firefox CSS Store, which can be found here: https://trickypr.github.io/FirefoxCSS-Store.github.io/

Moving to WebExtensions was the logical choice for Firefox, technical/security reasons aside, as they are not alienating extension developers that target Chromium-based browsers.

Yes, they alienated their own extension developers. Yes, they could've handled the transition better, and worked harder towards supporting some of the many APIs/functionalities that extension developers needed (or still need) for their extensions to work in the WebExtensions ecosystem. I myself was quite mad for a very long time at how they handled the switch, but I think overall it's been a success - my own personal feelings aside.

Linux support is pretty good these days and it's just as customizable as Vivaldi. See this repo for an example: https://github.com/aminomancer/uc.css.js

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.