my_firefox_theme VS FirefoxCSS

Or you can try themes from: https://firefoxcss-store.github.io/ some of them integrate well with Tree Style Tab, but you can use Sidebery if you like that one. My personal preference is My Firefox Theme — screenshots

Try: https://github.com/not-holar/my_firefox_theme (works with Tree Style Tabs)

Does anyone know if there is a fork of MinimalFox that works out of the box on linux ?

yeah, same, two bars for address and tabs (with fat padding) take up way too much screen space. i'm using a modified version of this https://github.com/marmmaz/FirefoxCSS to get a similar effect but I'm def gonna try that out.

/* One Line Code adapted from https://github.com/khuedoan/one-line-firefox/blob/master/userChrome.css*/ /* Title bar */ .titlebar-buttonbox { display: none !important; } .titlebar-spacer { display: none !important; } /* Tab bar */ #navigator-toolbox { border: 0px !important; } #TabsToolbar { margin-left: 61vw !important; width: 100% !important; } /* Nav bar*/ #urlbar-container { margin-right: 10vw !important; } /* Nav bar*/ #nav-bar { background: transparent !important; margin-top: -36px !important; margin-right: 50vw !important; /*! width 100% !important */ width: 100vw !important; } #urlbar { width: 48vw; } /* URL bar */ #back-button { display: none !important; } #forward-button { display: none !important; } #tracking-protection-icon-container { display: none !important; } #urlbar-container { min-width: 100px !important; } #urlbar { background: transparent !important; border: none !important; box-shadow: none !important; } #page-action-buttons { display: none !important; } #PanelUI-button { display: none !important; } /* User Added */ :root[uidensity="compact"] { --bookmark-block-padding: 3px !important; } :root { --toolbarbutton-border-radius: 0px !important; --toolbarbutton-inner-padding: 0px !important; } #urlbar { --urlbar-height: 36px !important; --urlbar-toolbar-height: 36px !important; } #tabbrowser-arrowscrollbox::part(scrollbutton-up), #tabbrowser-arrowscrollbox::part(scrollbutton-down) { border-radius: 0px; } #scrollbutton-up[disabled="true"] image { opacity: 0%; } #scrollbutton-down[disabled="true"] image { opacity: 0%; } #urlbar[open="true"] { width: 100vw !important; transition: width 50ms !important; } :root { --tab-border-radius: 0px !important; } #urlbar[breakout] { left: -3px !important; } /* AUTOHIDE */ /* Adapted from https://github.com/marmmaz/FirefoxCSS/blob/master/userChrome.css */ /*Auto Hide Top Bar - to disable auto-hide feature delete rows 1 - 86*/ :root { --uc-autohide-toolbox-delay: 200ms; /* Wait 0.1s before hiding toolbars */ --uc-toolbox-rotation: 65deg; /* This may need to be lower on mac - like 75 or so */ } :root[sizemode="maximized"] { --uc-toolbox-rotation: 63deg; } :root[sizemode="fullscreen"] { margin-top: 0px !important; } #navigator-toolbox { position: fixed !important; display: -webkit-box; transition: height 50ms; transform-origin: top; transform: rotateX(var(--uc-toolbox-rotation)); opacity: 0; line-height: 0; z-index: 1; pointer-events: none; } /* #mainPopupSet:hover ~ box > toolbox, /* Uncomment the above line to make toolbar visible if some popup is hovered */ #navigator-toolbox:hover, #navigator-toolbox:focus-within { transition-delay: 50ms !important; transform: rotateX(0); opacity: 1; } #navigator-toolbox > * { line-height: normal; pointer-events: auto; } /* Don't apply transform before window has been fully created */ :root:not([sessionrestored]) #navigator-toolbox { transform: none !important; } :root[customizing] #navigator-toolbox { position: relative !important; transform: none !important; opacity: 1 !important; }

config: github.com/marmmaz/FirefoxCSS

You can find my userChrome.css here: https://github.com/marmmaz/FirefoxCSS/