Description of problem:
It's unknown if this problem is really kde related. If the firefox was running during shutdown and is initialized at the next startup, it is unable to find any plugins. Closing the instance and starting it manually and everything is working fine. It seems like it is started wrong from session management.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Ensure that kde is starting application that are not closed within the next session.
1. Open firefox within a kde session
2. Restart the computer
3. Try use a plugin from firefox.
No plug-in is found.
Plug-ins can be used normally
There is really no plugin found. Even the dummy plugin from firefox is not listed using "about:plugins". Closing this instance and start firefox immedently again and everything is working fine. This problem is pretty nasty for user of sessions, cause it often happens that they notice this problem during working with the firefox. It's unknown if the problem also happens using gnome, so it might be kde related. It reproducable on two systems here.
*** This bug has been marked as a duplicate of bug 437596 ***