Nice work Rated 4 out of 5 stars

The RSS icon is the same of full screen one and the history icon must be improve.
Thanks.

This review is for a previous version of the add-on (4.2.7). 

thanks
versions 4.4.2
https://addons.mozilla.org/en-us/firefox/addon/mx3/versions/4.4.2

Rated 5 out of 5 stars

Great work, but there are some icons blue and others black, in my opinion a theme must have only one style, or all black or all blue.

This review is for a previous version of the add-on (2.4.7).