From Fedora Project Wiki
< KDE
Firefox KDE Integration
Native File Picker
There are 2 things one can do to change the file picker in firefox...
- Change the setting ui.allow_platform_file_picker to false in about:config
- 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
https://addons.mozilla.org/en-US/firefox/addon/59338/
Konquefox is another add-on which adds some KDE style buttons
https://addons.mozilla.org/en-US/firefox/addon/2671/
I personally would like the ability to use KDE bookmarks in firefox, but I haven't found anything thus far
Any suggestions?