Yeah that is the main thing I despise about a new version of FF.
What is worse is when your favourite addons are no longer being developed so its a case of they will never support the new FF.
you can hack them using Notebook but it just feels like you are waiting for a glitch to occur when you do it.
plus while on the subject the version I am waiting for is FF8. I tried the nightly build with support for X64 systems and jesus was it fast! Fastest loading browser I have tried by far to date so it will be a major release when it does come.