Firefox Integration problems
Someone should file all the issues here which aren't filed into bugzilla.mozilla.org, and make sure that all of these block the meta GNOME integration bug.
- uses its own notification popup for downloads instead of standard gnome notification.
- Has difficult Yes/No dialogs instead of explicit Do This/Do That dialogs.
- Preferences Dialog is not HIG-y.
GNOME library/settings integration issues
- doesn't use freedesktop spec to know how to open given file extensions. (Many distros appear to have a patch for this?)