$ lxappearance

~/.gtkrc-2.0

~/.config/gtk-3.0/settings.ini
...
gtk-theme-name="Menda"
...

--- Themes and keys

gtk-theme-menda

https://github.com/manjaro/release-plan/issues/43
sudo pacman -Sy vertex-maia-themes vertex-maia-icon-theme xcursor-maia
vertex-maia-themes:
For seamless integration of Firefox and Palemoon browsers please copy the 'chrome' folder of the desired theme to your browser profile or create a symlink.
For example:
    ln -s /usr/share/themes/Firefox/Vertex-Maia/chrome ~/.mozilla/firefox/9shb6xj3.default/chrome
    ln -s /usr/share/themes/Palemoon/Vertex-Maia-Dark/chrome/ ~/.moonchild\ productions/pale\ moon/<xyz123>.default/chrome


icon theme:

ls -la /usr/share/themes

~/.config/openbox/rc.xml

<theme>
    <name>Bear-tangerine</name>
    ...
</theme>