For Rhythmbox users who are using Gnome Shell, now there’s a plugin to make it look like a real Gnome application by enabling the GTK3 Client-side Decorations (Header bar).

Thanks to david mohammed, with this alternative-toolbar plugin Rhythmbox in Gnome looks like:

For non-gnome desktops, this plugin doesn’t use the CSD header bar by default. But there’s also a little changes:

If you really want the CSD header bar, non-gnome user cat get it in the plugin preferences.

How to install the plugin for Rhythmbox:

For Ubuntu 14.10 and Ubuntu 14.04, the plugin is available in the developer’s PPA.

Open terminal from the Dash or by pressing Ctrl+Alt+T on keyboard. When it opens, run below commands one by one to add the PPA, update system cache, and install the plugin:

sudo add-apt-repository -y ppa:fossfreedom/rhythmbox-plugins

sudo apt-get update

sudo apt-get install rhythmbox-plugin-alternative-toolbar

If you don’t want to add PPA, grab and install the .deb package directly from this page. Once installed, enable it by going to Tools -> Plugins.

For other systems and issues, go to the plugin’s project page.