mulcahey, 7 months ago

Here’s the one I used:

<span style="color:#323232;">/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/autohide_sidebar.css made available under Mozilla Public License v. 2.0
</span><span style="color:#323232;">See the above repository for updates as well as full license text. */
</span><span style="color:#323232;">
</span><span style="color:#323232;">/* Show sidebar only when the cursor is over it  */
</span><span style="color:#323232;">/* The border controlling sidebar width will be removed so you'll need to modify these values to change width */
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-box {
</span><span style="color:#323232;"> --uc-sidebar-width: 60px;
</span><span style="color:#323232;"> --uc-sidebar-hover-width: 210px;
</span><span style="color:#323232;"> --uc-autohide-sidebar-delay: 100ms; /* Wait 0.6s before hiding sidebar */
</span><span style="color:#323232;"> position: relative;
</span><span style="color:#323232;"> min-width: var(--uc-sidebar-width) !important;
</span><span style="color:#323232;"> width: var(--uc-sidebar-width) !important;
</span><span style="color:#323232;"> max-width: var(--uc-sidebar-width) !important;
</span><span style="color:#323232;"> z-index: 1;
</span><span style="color:#323232;"> background-color: #110a0d !important;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-box[positionend] {
</span><span style="color:#323232;"> direction: rtl;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">#sidebar-box[positionend] > * {
</span><span style="color:#323232;"> direction: ltr;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-box[positionend]:-moz-locale-dir(rtl) {
</span><span style="color:#323232;"> direction: ltr;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">#sidebar-box[positionend]:-moz-locale-dir(rtl) > * {
</span><span style="color:#323232;"> direction: rtl;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#main-window[sizemode="fullscreen"] #sidebar-box {
</span><span style="color:#323232;"> --uc-sidebar-width: 1px;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-splitter {
</span><span style="color:#323232;"> display: none;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-header {
</span><span style="color:#323232;"> overflow: hidden;
</span><span style="color:#323232;"> /* color: var(--chrome-color, inherit) !important; */
</span><span style="color:#323232;"> padding-inline: 0 !important;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-header::before,
</span><span style="color:#323232;">#sidebar-header::after {
</span><span style="color:#323232;"> content: "";
</span><span style="color:#323232;"> display: flex;
</span><span style="color:#323232;"> padding-left: 8px;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-header,
</span><span style="color:#323232;">#sidebar {
</span><span style="color:#323232;"> transition: min-width 115ms linear var(--uc-autohide-sidebar-delay) !important;
</span><span style="color:#323232;"> min-width: var(--uc-sidebar-width) !important;
</span><span style="color:#323232;"> will-change: min-width;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">#sidebar-box:hover > #sidebar-header,
</span><span style="color:#323232;">#sidebar-box:hover > #sidebar {
</span><span style="color:#323232;"> min-width: var(--uc-sidebar-hover-width) !important;
</span><span style="color:#323232;"> transition-delay: 0ms !important;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">.sidebar-panel {
</span><span style="color:#323232;"> /* background-color: transparent !important; */
</span><span style="color:#323232;"> /* color: var(--newtab-text-primary-color) !important; */
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">.sidebar-panel #search-box {
</span><span style="color:#323232;"> -moz-appearance: none !important;
</span><span style="color:#323232;"> /* background-color: rgba(249, 249, 250, 0.1) !important; */
</span><span style="color:#323232;"> color: inherit !important;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">/* Add sidebar divider and give it background */
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar,
</span><span style="color:#323232;">#sidebar-header {
</span><span style="color:#323232;"> background-color: inherit !important;
</span><span style="color:#323232;"> border-inline: 1px solid rgb(80, 80, 80);
</span><span style="color:#323232;"> border-inline-width: 0px 1px;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-box:not([positionend]) > :-moz-locale-dir(rtl),
</span><span style="color:#323232;">#sidebar-box[positionend] > * {
</span><span style="color:#323232;"> border-inline-width: 1px 0px;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">/* Move statuspanel to the other side when sidebar is hovered so it doesn't get covered by sidebar */
</span><span style="color:#323232;">
</span><span style="color:#323232;">#sidebar-box:not([positionend]):hover ~ #appcontent #statuspanel {
</span><span style="color:#323232;"> inset-inline: auto 0px !important;
</span><span style="color:#323232;">}
</span><span style="color:#323232;">#sidebar-box:not([positionend]):hover ~ #appcontent #statuspanel-label {
</span><span style="color:#323232;"> margin-inline: 0px !important;
</span><span style="color:#323232;"> border-left-style: solid !important;
</span><span style="color:#323232;">}`___`
</span>