It is important for firefox in gnome shell. Rated 5 out of 5 stars

Using it with
https://addons.mozilla.org/en-us/firefox/addon/adwaita/?src=collection&collection_id=56fd90b8-bc3e-4dbb-ae5d-254530f7b232.

Looks good.

This review is for a previous version of the add-on (1.3.1-signed.1-signed).