I can confirm that this bug is still occurring in ff3.5.1. I also have both firebug (1.4.2) and LiveHttpHeaders (0.15) add-ons installed.
Using Process Explorer (on Microsoft Windows Vista SP2), I am unable to forceably close the file handle (error is "file handle is invalid").
Also, it appears that uploading another file releases the first file handle, so this probably isn't a file handle leak... it's just that the last file uploaded is stuck open by ff/fb/lh.
I can confirm that this bug is still occurring in ff3.5.1. I also have both firebug (1.4.2) and LiveHttpHeaders (0.15) add-ons installed.
Using Process Explorer (on Microsoft Windows Vista SP2), I am unable to forceably close the file handle (error is "file handle is invalid").
Also, it appears that uploading another file releases the first file handle, so this probably isn't a file handle leak... it's just that the last file uploaded is stuck open by ff/fb/lh.