Graham Perrin's userChrome.css for Firefox

userChrome.css

/* https://old.reddit.com/r/firefox/comments/f942u2/profilespecific_problem_with_an_extension_button/ */
#TabsToolbar {
    visibility: collapse;
}
*{ transition-duration: 50ms !important }

/* a close button on the left of each tab */
/* https://support.mozilla.org/questions/1157451#answer-961582 */
/* https://support.mozilla.org/questions/1157451#answer-961663 */
.tabbrowser-tab .tab-close-button {
    display:-moz-box!important;
    -moz-box-ordinal-group: 0 !important;
    margin-left: -2px !important;
    margin-right: 3px !important;
}
.tabbrowser-tab .tab-throbber,
.tabbrowser-tab .tab-icon-image,
.tabbrowser-tab .tab-sharing-icon-overlay,
.tabbrowser-tab .tab-icon-overlay,
.tabbrowser-tab .tab-label-container,
.tabbrowser-tab .tab-icon-sound {
    -moz-box-ordinal-group: 2 !important;
}

/* Australis Menu Button on the Left */
#PanelUI-button,
#customization-panel-container,
#customization-panelWrapper .panel-arrow,
#ctr_panelui-button,
#wrapper-ctr_panelui-button {
    -moz-box-ordinal-group: 0
}
#PanelUI-button {
    background-position: 100% 0, calc(100% - 1px) 0, calc(100% - 2px) 0;
}
#PanelUI-popup {
    margin-right: -350px!important;
}
#PanelUI-popup .panel-arrow {
    margin-right: 340px!important;
}

/* #nav-bar{-moz-box-ordinal-group:5!important} ? the toolbar, a.k.a. navigation bar, not on top */
#nav-bar{
    -moz-box-ordinal-group:5!important
} */

/* monospace #urlbar  */
/* https://www.reddit.com/comments/8vq7cx/-/e1q6d9g/ */
#urlbar {
    font-family: "Source Code Pro", "Anonymous Pro", "Inconsolata", "Consolas", monospace;
}

/* green padlock */
/* https://www.reddit.com/comments/8v4l1h/-/e1kxtgx/ */
/* #identity-box #identity-icon-labels {
    display:none
}
#identity-box:hover #identity-icon-labels {
    display:-moz-box
}
/* https://support.mozilla.org/questions/853327#answer-222153 */
/* #identity-icon-labels { display:none!important; } */
/* #identity-box:hover #identity-icon-labels { display:block!important; } */

/* https://www.reddit.com/r/FirefoxCSS/comments/fzshcx/-/fn6i1k5/ */
/* Constrains urlbar popup to urlbar width */
/* Firefox 70+ */

#urlbar-container {
    transform: translateY(0);
    position: relative;
    z-index: 10;
    padding-block: 3px !important;
    padding-inline: 0x !important;
    margin-inline: 5px !important;
}

#nav-bar-customization-target {
    overflow: visible !important;
}

#urlbar-results {
    max-width: 100% !important;
}

.urlbarView {
    top: calc(100% - 10px) !important;
    width: 100% !important;
    border-color: transparent !important;
}

:root[uidensity="compact"] .urlbarView {
    margin-top: 8px !important;
}

:root[uidensity="touch"] .urlbarView {
    margin-top: 6px !important;
}

#urlbar[open] {
    border-bottom-right-radius: 0px !important;
    border-bottom-left-radius: 0px !important;
}

.urlbarView-row {
    padding: 3px 4px !important;
}