install_hide_firefox_titlebar.sh

#!/bin/bash
# date: 2017-11-17
# license: GPLv3 https://www.gnu.org/licenses/gpl-3.0.txt
# author: nanpuyue <nanpuyue@gmail.com> https://blog.nanpuyue.com

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/hide-firefox-titlebar.sh",
    "type": "stdio",
    "allowed_extensions": ["hide-titlebar@nanpuyue.com"]
}
EOF

echo 'install: ~/.local/bin/hide-firefox-titlebar.sh'
[[ -d ~/.local/bin ]] || mkdir -p ~/.local/bin
cat > ~/.local/bin/hide-firefox-titlebar.sh << "EOF"
#!/bin/bash
# date: 2017-11-17
# license: GPLv3 https://www.gnu.org/licenses/gpl-3.0.txt
# author: nanpuyue <nanpuyue@gmail.com> https://blog.nanpuyue.com

python3 -c "import gi; gi.require_version('Gdk', '3.0'); from gi.repository import Gdk, GdkX11;
default_display=GdkX11.X11Display.get_default();
$(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);"
done)
Gdk.Window.process_all_updates();"
EOF
chmod +x ~/.local/bin/hide-firefox-titlebar.sh

echo 'done'

1. download
   
2. run:

bash ./install_hide_firefox_titlebar.sh

3. install xdotool:

sudo apt install xdotool

4. install addon: https://addons.mozilla.org/firefox/addon/hide-the-titlebar/

Hey, there's an unwanted '\n' when the script writes the file:
"
gdk_window =
GdkX11.X11Window.foreign_new_for_display(GdkX11.X11Display.get_default(),
$i);'
"
However it's not working on my archlinux xfce. :/

debug:

bash -x ~/.local/bin/hide-firefox-titlebar.sh

➜ Desktop bash -x ~/.local/bin/hide-firefox-titlebar.sh

++ xdotool search --onlyvisible --class 'Firefox|Nightly'

• for i in $(xdotool search --onlyvisible --class "Firefox|Nightly")
• python3 -c 'import gi;gi.require_version('''Gdk''', '''3.0'''); from gi.repository import Gdk, GdkX11; gdk_window = GdkX11.X11Window.foreign_new_for_display(GdkX11.X11Display.get_default(), 54526072); Gdk.Window.set_decorations(gdk_window, Gdk.WMDecoration.BORDER); Gdk.Window.process_all_updates()'
• for i in $(xdotool search --onlyvisible --class "Firefox|Nightly")
• python3 -c 'import gi;gi.require_version('''Gdk''', '''3.0'''); from gi.repository import Gdk, GdkX11; gdk_window = GdkX11.X11Window.foreign_new_for_display(GdkX11.X11Display.get_default(), 54525968); Gdk.Window.set_decorations(gdk_window, Gdk.WMDecoration.BORDER); Gdk.Window.process_all_updates()'

'+' are replaced by • .

Thanks a lot ! Worked perfectly for me (Ubuntu + Cinnamon).

Great! It worked nicely on Lubuntu 17.10, helping to save vertical space on Firefox 58, as the good old Hide Caption Titlebar Plus did with Firefox 56 and before. Just one thing: is it possible to remove padding between tabs and the top of the screen?

EDIT: Nevermind, I solved it by editing the file /home/(myusername)/.config/openbox/lubuntu-rc.xml, adding the following lines under the <applications> section:

<application role="browser">
  <decor>no</decor>
</application>

then saving the file and running openbox --reconfigure. Also, I opened obconf, clicked on "Appearance" and unchecked "Windows retain a border when undecorated". Done.

Thanks, works great, just using the window buttons extensions and not using this (since I can do I though my window manager).

Replaces the old "Hide caption titlebar plus" which died after firefox 56.

It doesn't work on Manjaro Cinnamon

Works, but am now completely unable to minimize or drag the window. ArchLinux with Deepin.

@SylveonBottle How about draging it with Alt key pressed - this takes care of the minimizing and dragging part.

Thanks. Works on Deepin 15.5.
@SylveonBottle If you wish, install 3 additional extensions in order to recover the min/max/close buttons.
https://addons.mozilla.org/firefox/addon/minimize-the-window/ https://addons.mozilla.org/firefox/addon/maximize-the-window/ https://addons.mozilla.org/firefox/addon/close-the-window/

Not doing all that much.

bash -x ~/.local/bin/hide-firefox-titlebar.sh
+++ xdotool search --onlyvisible --class 'Firefox|Nightly'
++ for i in $(xdotool search --onlyvisible --class "Firefox|Nightly")
++ echo 'GdkX11.X11Window.foreign_new_for_display(default_display, 127926289).set_decorations(Gdk.WMDecoration.BORDER);'
+ python3 -c 'import gi; gi.require_version('\''Gdk'\'', '\''3.0'\''); from gi.repository import Gdk, GdkX11;
default_display=GdkX11.X11Display.get_default();
GdkX11.X11Window.foreign_new_for_display(default_display, 127926289).set_decorations(Gdk.WMDecoration.BORDER);
Gdk.Window.process_all_updates();'

Is this project still active?

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"