Rated 5 out of 5 stars

Unfortunatley can not find out how to make "utilities'' button on toolbar like in Chrome...

The userStyle :

#undoclosetab-button .toolbarbutton-icon {
-moz-transform: scaleX(1) rotate(0deg) !important;
list-style-image: url("data:image/png;base64,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") !important;
-moz-image-region: rect(0px, 18px, 18px, 0px) !important;
width: 18px !important;
height: 18px !important;
}

has nothing changed...
Thank you for support.
Beside this it is the best theme I have ever used .

This review is for a previous version of the add-on (11).  This user has other reviews of this add-on.

Toolbar Appmenu Button
https://addons.mozilla.org/en-us/firefox/addon/toolbar-appmenu-button/

#main-window[tabsontop="true"][sizemode="normal"] #toolbar-menubar[inactive] ~ #TabsToolbar {
-moz-padding-start: 3px !important;
}

#toolbar-appmenu-button > .toolbarbutton-icon {
list-style-image: url("chrome://mozapps/skin/extensions/utilities.png")!important;
-moz-image-region: rect(0, 18px, 18px, 0)!important;
}