Mozilla downloads files to /tmp, then moves them to their final destination. Problems: 1. It's very hard to monitor the progress of such a download. 2. If /tmp has only 100MB available, it's *TOTALLY IMPOSSIBLE* to download a 101MB file - even if the final destination has gigabytes free. 3. There seems to be no way to override this behavior, even to specify an alternative. Certainly, it appears that Mozilla is ignoring TMPDIR and similar environment variables. I would be happiest if the download simply occurred in-place. I could live with it being optional, or with, at the *VERY* least, the option of specifying an alternative location for temporary downloads.
Gilles, you 're hesitating because this report actually describes two bugs. But, because the reporter gives more importance to disk space problem, I would mark it as a dupe of bug 55690.
*** This bug has been marked as a duplicate of 55690 ***
reporter: you didn't include a build id, or milestone identifier. according to my source readings, and a friend's testing of mozilla0.9.7linux, we do honor TMPDIR. vrfy dupe.