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# date: 2017-11-17
# license: GPLv3
# author: nanpuyue <>
echo 'install: ~/.mozilla/native-messaging-hosts/hide_titlebar.json'
[[ -d ~/.mozilla/native-messaging-hosts ]] || mkdir -p ~/.mozilla/native-messaging-hosts
cat > ~/.mozilla/native-messaging-hosts/hide_titlebar.json << EOF
"name": "hide_titlebar",
"description": "Hide the Firefox titlebar.",
"path": "$HOME/.local/bin/",
"type": "stdio",
"allowed_extensions": [""]
echo 'install: ~/.local/bin/'
[[ -d ~/.local/bin ]] || mkdir -p ~/.local/bin
cat > ~/.local/bin/ << "EOF"
# date: 2017-11-17
# license: GPLv3
# author: nanpuyue <>
python3 -c "import gi; gi.require_version('Gdk', '3.0'); from gi.repository import Gdk, GdkX11;
$(for i in $(xdotool search --onlyvisible --class "Firefox|Nightly"); do
echo "GdkX11.X11Window.foreign_new_for_display(default_display, $i).set_decorations(Gdk.WMDecoration.BORDER);"
chmod +x ~/.local/bin/
echo 'done'
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sjonathansilva commented Mar 20, 2020

PSA: Anyone looking for this feature, before trying this script check if you have the option to disable the title bar down in the lower left corner of the firefox customization screen.

Right click Menu Button > Customize > Uncheck "Title Bar"

Thanks, man! you`r a firefox's god

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