The string "separate buttons" was already in the "About this Add-on" section, but I don't know if that would help in searching.
I have edited the Description, sprinkling it with the word "separate". I have also edited the Tags, adding: separate, separate back and forward, separate buttons. There is a limit of 20 tags & I was already using 18 before, so I had to remove some old ones to fit the new ones in.
Hopefully, it's more findable now?
Anyway, thx for the review! -- I find Firefox unusable out-of-the-box...I need at least 15+ Addons just to make it "normal", NoUn Buttons being one of them.