first commit

userChrome.css

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+/* [instructions.md](https://gist.github.com/morrolinux/87aa37396432ea5d14a9220bc4892100) */
+
+#TabsToolbar>.toolbar-items{
+    display: none;
+  }
+  
+  /* sidebar */
+  #sidebar-header {
+    display: none;
+  }
+  
+  
+  :root {
+    --thin-tab-width: 38px;
+    --wide-tab-width: 300px;
+  }
+  
+  #sidebar-box:not([sidebarcommand="_3c078156-979c-498b-8990-85f7987dd929_-sidebar-action"]) {
+    min-width: var(--wide-tab-width) !important;
+    max-width: none !important;
+  }
+  
+  #sidebar-box[sidebarcommand="_3c078156-979c-498b-8990-85f7987dd929_-sidebar-action"] {
+    overflow: hidden !important;
+    position: relative !important;
+    transition: all 300ms !important;
+    min-width: var(--thin-tab-width) !important;
+    max-width: var(--thin-tab-width) !important;
+    transition-delay: 600ms !important;
+    z-index: 2;
+  }
+  
+  #sidebar-box[sidebarcommand="_3c078156-979c-498b-8990-85f7987dd929_-sidebar-action"]:hover,
+  #sidebar-box[sidebarcommand="_3c078156-979c-498b-8990-85f7987dd929_-sidebar-action"] #sidebar {
+    transition: all ease-out 300ms !important;
+    min-width: var(--wide-tab-width) !important;
+    max-width: var(--wide-tab-width) !important;
+    transition-delay: 300ms !important;
+    z-index: 1;
+  }
+  
+  #sidebar-box[sidebarcommand="_3c078156-979c-498b-8990-85f7987dd929_-sidebar-action"]:hover {
+    margin-right: calc((var(--wide-tab-width) - var(--thin-tab-width)) * -1) !important;
+  }
+  
+  #root:not(:hover) .NavigationBar .nav-item[data-active=false] {
+    opacity: 0;
+  }
+  
+  #root:not(:hover) .NavigationBar .nav-item[data-active=true] {
+    transform: translateX(0);
+  }