When I upgraded to Kubuntu Lucid Lynx, they promised:
Firefox now integrates better with KDE, providing native KDE file dialogs as well as respecting your default choices for opening files, as set in KDE.
I was excited, no more having to keep a separate favorite places for Firefox and Dolphin. In reality after I upgraded I saw no such “integration.”
So several months later it bugged me enough to take another look at the problem. Reading the same copy as before I noticed a new sentence that either I missed or wasn’t there before:
Our Kubuntu Firefox Installer makes sure the necessary packages are installed, if you have installed Firefox manually you will need to install kmozillahelper for the integration.
Hmm… since I upgraded and didn’t install from scratch it seems that I needed to install the kmozillahelper package. Once I did and restarted Firefox, it worked. One step closer to an integrated desktop. Now I I could find a way to do this in chrome, openoffice.org, gimp…