Update base theme

src/base.css

@@ -1,3 +1,15 @@
+/* ==UserStyle==
+@name           Gruvbox for DOMAIN
+@namespace      git.m3.fyi/Marsn3
+@version        1.0.0
+@description    Gruvbox Theme for DOMAIN
+@author         Marsn3
+@homepageURL https://git.m3.fyi/Marsn3/userstyles
+@updateURL https://git.m3.fyi/Marsn3/userstyles/~raw/main/src/DOMAIN.user.css
+@license MIT
+==/UserStyle== */
+
+@-moz-document domain("DOMAIN.TLD") {
 :root {
   --bg_h: #1d2021;
   --bg: #282828;
@@ -33,3 +45,4 @@
   --monospaceFontFamily: "ComicCodeLigatures Nerd Font", "Ubuntu Mono",
     monospace, emoji;
 }
+}