Firefox keeps downloaded files open?

Christian Weisgerber naddy at
Sat Nov 30 21:15:14 UTC 2019

Lately I've been downloading some large files with Firefox.  Once
the download has successfully finished, I "Clear Downloads" in the
Firefox download library window, so Firefox should forget about the
files.  I then copy them to a different filesystem and rm the
original.  _Sometimes_ the disk space is not freed.  Obviously
Firefox is still keeping a file descriptor open, because quitting
Firefox then immediately frees the disk space.

Is anybody else seeing this?  It only happens intermittently.
Sometimes the disk space is freed immediately following the rm,
sometimes it isn't.

I've started noticing this in recent weeks, but that may simply be
due to my usage pattern.  FreeBSD 12-STABLE with whatever the lastest
www/firefox port is, currently 71.0.

Christian "naddy" Weisgerber                          naddy at

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