No longer confusing ... Rated 5 out of 5 stars

' New Tab Wallpapers' version 13.15.63 now displays selected background image even with thumbnails hidden. It does it perfectly and I consider this is a necessary feature given the purpose of this add-on.

I have been using up to now a similar add-on called 'Customize about:newtab', but the advantage of 'New Tab Walpapers' is IMO :

1- Allows selecting a Web image ;
2- The project's Todoes, random wallpapers and automatic wallpaper switch, is innovative and IMO a true pleasure for users as myself spend a lot of time on the computer with Firefox.

So, a fine add-on with its definitely own character. It may seem to some users to be pushy to elaborate on details but, are they truly details and, well, if something is done I believe it has at least the importance of being carried out in extenso. No doubt 'New Tab Wallpapers' is in the lot, regularly updated and the feeling its developer is of those who likes to advance in the project.

Nice work. I guess thanks is not required :)

Confusing ... Rated 3 out of 5 stars

Clicking on the square icon to the upper right of that New Tab page hides the thumbnail pictures and your choice is remembered even after you restart Firefox. Problem is, it also hides your background image.

Note that the square icon remains displayed – if you click it again the thumbnail pictures will reappear on New Tab pages. As well as your background image.

The developer is racing after updating his add-on, but doesn't seem to be willing to consider having the background maintained when the thumbnails are hidden.

This review is for a previous version of the add-on (11.99.63.1-signed). 

Well, now it shows when tabs hidden. You may check 13.15.63.