diff --git a/src/tabbar/_fill_width.scss b/src/tabbar/_fill_width.scss
new file mode 100644
index 0000000..2da94c5
--- /dev/null
+++ b/src/tabbar/_fill_width.scss
@@ -0,0 +1,8 @@
+// Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/tabs_fill_available_width.css made available under Mozilla Public License v. 2.0
+// See the above repository for updates as well as full license text.
+
+/* Why 100vw? Tab closing requires width animation to end and "none" can't be animated */
+.tabbrowser-tab[fadein]:not([style^="max-width"]) {
+  --tab-max-width: 100vw;
+  max-width: var(--tab-max-width) !important;
+}
diff --git a/src/urlbar/_home_button.scss b/src/urlbar/_home_button.scss
new file mode 100644
index 0000000..3fb5a18
--- /dev/null
+++ b/src/urlbar/_home_button.scss
@@ -0,0 +1,31 @@
+#nav-bar-customization-target > #home-button {
+  z-index: 3;
+  position: relative;
+
+  background-color: var(--toolbar-bgcolor) !important;
+  background-clip: content-box !important;
+  border-radius: 100%;
+
+  padding-block: 0 !important;
+  padding-inline-end: 0 !important;
+
+  > .toolbarbutton-icon {
+    background-color: var(--uc-combined-circlebutton-background);
+    background-origin: padding-box;
+    background-clip: padding-box;
+    border: 1px solid var(--uc-combined-circlebutton-border-color);
+    border-radius: 10000px !important;
+
+    padding-inline-end: var(--urlbar-icon-padding) !important;
+    height: auto !important
+  }
+  &:hover > .toolbarbutton-icon {
+    background-color: var(--uc-combined-circlebutton-hover-background) !important;
+    box-shadow: 0 1px 6px hsla(0,0%,0%,.1);
+    border-color: hsla(240,5%,5%,.35);
+  }
+  &:hover:active > .toolbarbutton-icon {
+    background-color: var(--uc-combined-circlebutton-active-background) !important;
+    border-color: hsla(240,5%,5%,.40);
+  }
+}