changing views

hi,
i arrange my FF so that all the frequently used book marks and the search engine are close in one tool bar so that i can save space in the screen and it has been very handy, but in the recent updates firefox does not like to do this , and the icons are
large and they keep changing even if i choose small icons only, and even after i arrange the view according to my wish by he next login everything has changed.
any ideas please.

rameez