Font Manager is a free and open source font management application for Linux. Using this you can add,remove and install the fonts to your desktop fonts easily . It will work very well on all GTK based desktop environments. It comes with Google Fonts support. Using this you can install fonts directly from your application. It is released under GNU General Public License v3.0. It also comes with GNOME Shell search provider feature.
Some other important features are compare and preview your font, integrated character map support, activate or deactivate installed font and User,Desktop font settings.
Install Font Manager on Ubuntu
Font Manager is available via Flatpak and Ubuntu official PPA.
Install Font Manager via Flatpak:
Follow below link if you don’t have flatpak and flathub installed on your system. Restart your system after the installation. If you already installed just skip this.
Open the terminal command-line application (ctrl+alt+t) and run below flatpak installation command.
flatpak install flathub org.gnome.FontManager
It will install Font Manager on your system. Then you can open it via below command.
flatpak run org.gnome.FontManager
Install Font Manager via PPA:
You can also install Font Manager via Ubuntu PPA. In your terminal run these commands.
sudo add-apt-repository ppa:font-manager/staging
sudo apt-get update
sudo apt-get install font-manager