Godie

Tested in Firefox developer edition
Hi, I used this two files (window_control_placeholder_support.css + hide_tabs_toolbar.css) for tree-tabs but seems like they will need an update. The window controls only shows when press Alt and the menubar shows behind the urlbar.

Issue in Firefox beta
hi, I set a z-index in 2 elements but don't work and I can't solve it.
I have this code to move the hamburger menu to left top side:

:root:not([chromehidden~="toolbar"]) #PanelUI-button {
        position: fixed;
        display: flex;
        top: var(--windowed-top-padding, 0px);
        left: 0px !important;
        z-index: 3 !important;
    }

and I have this code to move higher the Firefox Sidebar:

:root:not([sizemode="fullscreen"]):has(sidebar-main:not([expanded])) {
        & #sidebar-main {           
                /* Bakground-color necessary for gradient line color */
            background-color: var(--lwt-frame) !important;
                /* Top-bottom margins */
            padding-top: var(--padding-top-left-sidebar) !important;
                /* Gradient line */
            margin-top: calc( -1px - var(--bookmarksbar-height-personal, 0px) - var(--toolbar-height-personal) -
                             var(--Space-before-gradient-line)) !important;
            border-inline-end: 1px solid red !important;
            z-index: 2 !important;
        }
    }

the problem is the hamburger menu stay behind the Sidebar, I wonder why the z-index don't work.

hi, I would like to know how to Apply margin to web content but not when a video is in fullscreen? and keep the margin when Firefox is in fullscreen. I mean I would like to apply a margin to web content that not affect when a video is in fullscreen. I used this code:

:root:not([chromehidden~="toolbar"]) {
        
        /* Web content */
        & #appcontent{
            margin-inline-start: var(--my-vertical-toolbar-width) !important;
        }

        /* Sidebar + sidebar content */
        & #sidebar-box[checked="true"] {
            margin-inline-start: var(--my-vertical-toolbar-width) !important;
        }

        /* Sidebar + sidebar content + web content */
        & #sidebar-box[checked="true"] ~ #appcontent {
            margin-inline-start: 0px !important;
        }
    }

but that applies a margin when a video is in fullscreen, I tried too this code but removes the margin when Firefox is in fullscreen:

:root:not([chromehidden~="toolbar"],[sizemode="fullscreen"]) {
     ...
}

hi, I'm using window_control_force_linux_system_style.css and works fine to get the theme styles of the system, but the ':hover' is working bad, the ':hover' effect keep the image or background color even if I'm out of that buttons. with other system themes the effect is more noticeable.

Hi, I used this code and it used to work perfectly, but I tried it just now and I'm having some visual issues like in the screenshot.
1.- the url border (not open, not focus) display 1px inside the url default border.
2.- when urlbar is open the border don't expand properly.

hi,
I wonder if is possible to fix this rare behavior when I apply the next css in the new-tab:

body{
backdrop-filter: brightness(99%);
}

if I don't add the filter there isn't a scroll.

hi, I'm asking for help to solve this inconvenient when I try to replace the default wallpapers in newtab page.
Fist of all I'm using the developer Firefox version that use beta version to do this.

I have activated this preference in about:config page:

browser.newtabpage.activity-stream.newtabWallpapers.enabled to true

after that I replaced the wallpapers thumbnails successfully with the next code:

/* Miniaturas de wallpapers */

/* Dark */

.wallpaper-input.dark-landscape { background-image: url("../newtab/wallpaper-dark.png") !important; }

.wallpaper-input.dark-panda { background-image: url("../newtab/wallpaper-dark2.png") !important; }

.wallpaper-input.dark-color { background-image: url("../newtab/wallpaper-dark3.png") !important; }

.wallpaper-input.dark-sky { background-image: url("../newtab/wallpaper-dark4.png") !important; }

.wallpaper-input.dark-mountain { background-image: url("../newtab/wallpaper-dark5.png") !important; }

.wallpaper-input.dark-beach { background-image: url("../newtab/wallpaper-dark6.png") !important; }

but when I try to replace the wallpaper for the first image in newtab page it don't work with the path I used to use, for example this code:

body:has(#dark-landscape[aria-checked="true"]){
--newtab-wallpaper-dark: url("../newtab/wallpaper-dark.png") !important;
    }

and only works when I use a url for the new image like this:

body:has(#dark-landscape[aria-checked="true"]){
--newtab-wallpaper-dark: url(https://i.imgur.com/It1Ugaa.png) !important;
}

so I wonder if is my mistake or is a Firefox bug, or maybe there is a trick to solve it? cause I would like to use local images and not urls.

I'm using this stile from @MrOtherGuy : vertical_popup_menubar.css and that makes the menu items from Library disappear.

I'm using Firefox-beta v.125 on Manjaro-KDE, I use the code from here: window_control_force_linux_system_style.css but seems like don't work right anymore, the system buttons appear overlapping the default, maybe that could be a temporal issue cause is beta version, I don't know.

I used this code which places the tab above the vertical bookmarks bar, but in this new Firefox-beta v.123 the code stop working, I tried a bigger number and don't work, I tried to put a lower index to the bookmark-bar and a bigger number to the selected tab and didn't work. I need a beautiful help. my theme is this Firefox-gx

I would like to change this preference to something like this: AccentColor: red !important; but don't work.

I use some code that use the position of the tab to give some style but when that Firefox-view tab is active create a invisible tab that makes the code wrong. I would like to have that tab visible, and work with that or I don't know jeje