Re: FireFox browser question: some pages are too wide for screen
This page I am on using Fx is readable so that makes it usable.
The layout reads left to right and top to bottom so that is sensible.
Maybe you should contact MoFo and express your concerns.
They might suggest glasses so do not be shocked.
Edit* Seriously though you have been around long enough that you could file a bug or vote for a bug filed already. If users do not vote for bugs they do not get worked on. This is the same in the real world with low priority issues being pushed off to the side.