Installation:

<code>
sudo apt install mono-complete
sudo apt install keepass2
</code>

Integration in Firefox:

[[https://addons.mozilla.org/de/firefox/addon/keefox/|KeyFox]]
<code>
sudo cp $HOME/.mozilla/firefox/*.default/extensions/keefox@chris.tomlinson/deps/KeePassRPC.plgx /usr/lib/keepass2/plugins/
</code>

Tray-Icon für XFCE:
<code>
sudo apt-add-repository ppa:dlech/keepass2-plugins
sudo apt update
sudo apt install keepass2-plugin-application-indicator
</code>