first commit

userChrome.css

@@ -0,0 +1,24 @@
+
+#statuspanel {display:none!important;}
+#urlpanel {display:none!important;}
+
+#TabsToolbar {
+  visibility: collapse !important;
+}
+
+
+#nav-bar {
+  background-color: rgba(0, 0, 0, 0.3) !important;
+  backdrop-filter: blur(6px);
+  -moz-backdrop-filter: blur(6px);
+}
+#navigator-toolbox:not(:hover) #nav-bar {
+    visibility: collapse !important;
+}
+/* Hide that 1px border to make the background
+ * between tab and a normal web page looks "seamless"
+ */
+
+#navigator-toolbox:not(:hover) {
+    border-bottom: none !important;
+}