Description of problem:

Since Fedora 11 Firefox no longer automaticaly knows the location of the Nautilus binary. When you download a file for example and right click on the downloaded file in firefox's downloads window and click open containing folder you get prompted with a box asking how to open the folder.

Version-Release number of selected component (if applicable):

Every firefox version bundled or updated from official Fedora 11 repositories
How reproducible:
It is allways reproduceable

Steps to Reproduce:
1.Open Firefox
2. Download a file
3. Right click on the file in the downloads list and select Open containing folder
  
Actual results:
You get a box asking you to pick a program to open the file

Expected results:

It should open the folder the item was downloaded to
Additional info:
While this is by no means a huge flaw it is annoying and something that seemed to work in Fedora 10 and before.

You can temporarily circumvent this by selecting the nautilus executable when it asks for the program needed to open the file or simple use KDE