Pocket button is missing, and there is NO setting to customize toolbar to get it back!

The instructions to customize the toolbar do not match the symbols in android tablet firefox. There is no way I found a setting to customize. I had a pocket button for my much used pocket account last year, but not here, not now. Add-ons do not match the onstructions either! I found them uner Tools, BUT there is no old pocket add on to remove! No way to customize the toolbar!