Since Firefox 2.0, adding "ui.allow_platform_file_picker" set to "false" in "about:config", provides a file saving dialog that should be more convenient for KDE users. AFAIK, adding "FILEPICKER_CONTRACTID" to /usr/lib/firefox/components/nsFilePicker.js doesn't work anymore.
Since Firefox 2.0, adding "ui.allow_ platform_ file_picker" set to "false" in "about:config", provides a file saving dialog that should be more convenient for KDE users. AFAIK, adding "FILEPICKER_ CONTRACTID" to /usr/lib/ firefox/ components/ nsFilePicker. js doesn't work anymore.