More monitor landscape :) Rated 5 out of 5 stars

worked excellent for 5 minutes but after i clicked to un-hide the menu bar to see what it would look like, after i hid it back...for some reason it disabled the orange Firefox button on left as well as the minimize/maximize/close window buttons on right side, it was working fine a minute ago those buttons worked with this, and it just stopped now, restarted ff, reinstall this app...still the same, now the only way i can use them is double clicking either the orange firefox button or the min/max/X buttons and it will automatically resize firefox to not maximize, enabling the buttons again, and after maximizing, it will disable the buttons

This review is for a previous version of the add-on (1.1-signed.1-signed). 

Could you try again with v3 to see if hiding/unhiding menus work correctly for you?