diff --git a/README.md b/README.md
index 8771440..66965ca 100644
--- a/README.md
+++ b/README.md
@@ -46,10 +46,6 @@ This theme is supposed to work with current supported Firefox releases:
 	- Set custom profile name, for example `e0j6yb0p.default-nightly`
 	- Default: standard default profile
 
-- `-g` *optional*
-	- Auto enable GNOMISH extra features `hide-single-tab.css` & `matching-autocomplete-width.css`
-
-
 ### Manual installation
 1. Go to `about:support` in Firefox.
 
diff --git a/scripts/install.sh b/scripts/install.sh
index 81e23ca..8cc6614 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -3,7 +3,6 @@
 THEMEDIRECTORY=$(cd `dirname $0` && cd .. && pwd)
 FIREFOXFOLDER=~/.mozilla/firefox
 PROFILENAME=""
-GNOMISHEXTRAS=false
 
 # Determine firefox profile being currently used programatically
 # credits: https://stackoverflow.com/questions/57526217/
@@ -18,7 +17,6 @@ while getopts 'f:p:g' flag; do
 	case "${flag}" in
 		f) FIREFOXFOLDER="${OPTARG}" ;;
 		p) PROFILENAME="${OPTARG}" ;;
-		g) GNOMISHEXTRAS=true ;;
 	esac
 done
 
@@ -53,13 +51,6 @@ cp -R $THEMEDIRECTORY $PWD
 # Import this theme at the beginning of the CSS files.
 sed -i '1s/^/@import "firefox-gnome-theme\/userChrome.css";\n/' userChrome.css
 
-# If GNOMISH extras enabled, import it in customChrome.css.
-if [ "$GNOMISHEXTRAS" = true ] ; then
-	echo "Enabling GNOMISH extra features"
-	[[ -s customChrome.css ]] || echo >> firefox-gnome-theme/customChrome.css
-	sed -i '1s/^/@import "theme\/hide-single-tab.css";\n/' firefox-gnome-theme/customChrome.css
-fi
-
 cd ..
 
 # Symlink user.js to firefox-gnome-theme one.