Multiple monitor panels

In GNOME you can have multiple monitor panels using this extention

https://extensions.gnome.org/extension/921/multi-monitors-add-on/

Dash to Panel on bottom:

https://extensions.gnome.org/extension/1160/dash-to-panel/

Arc Menu in panel

https://extensions.gnome.org/extension/3628/arcmenu/

To be able to activate Gnome extentions from firefox, install this Firefox extention:

https://addons.mozilla.org/nl/firefox/addon/gnome-shell-integration/