From Fedora Project Wiki

Firefox KDE Integration

Native File Picker

There are 2 things one can do to change the file picker in firefox...

  1. Change the setting ui.allow_platform_file_picker to false in about:config
  2. Install kgtk
yum install kgtk
[bash ~]$ kgtk2-wrapper firefox

Other Integrations

I have seen other suggestions like just using a particular theme to make firefox look more integrated however this one only works if you use the default Oxygen theme

Konquefox is another add-on which adds some KDE style buttons

I personally would like the ability to use KDE bookmarks in firefox, but I haven't found anything thus far

Any suggestions?