One thing that I missed when I converted to Firefox from Mozilla is Mozilla Composer. I used Mozilla Composer all the time to deal with printer-hostile web pages.
Then I heard Brendan Eich interviewed on IT Conversations, in which he mentioned NVU---an open source standalone HTML editor/Web Authoring System that is going to be the successor to Mozilla Composer.
It is still under development by Linspire (Lindows). I downloaded NVU 0.50 for both Windows and Linux. It looks and feels very much like Mozilla Composer. And for my purpose, it does a wonderful job, just as Mozilla Composer.