I was also using Ubuntu Firefox Modifications 0.6 together with Tab Mix Plus 0.3.7pre080728. Now I disabled Ubuntu Firefox Modifications and my button positions are no longer resetting after a firefox restart.
I was also using Ubuntu Firefox Modifications 0.6 together with Tab Mix Plus 0.3.7pre080728.
Now I disabled Ubuntu Firefox Modifications and my button positions are no longer resetting after a firefox restart.