Hide title bar in Gnome 3.12

I solved this by using Maximus.

For newer versions of gnome (> 3.8) you may need to edit metadata.json to match this pull request and manually install the extension. Instructions lifted from maximus homepage with a few edits:

hg clone ssh://[email protected]/mathematicalcoffee/maximus-gnome-shell-extension
hg up gnome3.4 # or `stable` if on GNOME 3.2
cd maximus-gnome-shell-extension
# NOW OPEN AND EDIT THE OUTDATED metadata.json FILE. See link above.
make # <-- VERY IMPORTANT
cp -r [email protected] ~/.local/share/gnome-shell/extensions
# enable maximus if you haven't already:
gnome-shell-extension-tool -e [email protected]
Restart gnome-shell.

Welcome to the wonderful world of Gnome 3.12's forced client side decorations. CSD are hardcoded in GTK 3.12, the only way to get rid of them is to downgrade GTK to V 3.10.

Gnome Shell Extension Pixel Saver just works.

https://github.com/deadalnix/pixel-saver

You have to use the Tweak Tool and change the Window Theme from there.