Strange files: .fxsnapshot files under /tmp directory

[ishikawa]

Hi,

Since the day before (Feb 15), I have seen strange files with names ending with
".fxsnapshot" under /tmp directory.
(I am using Debian GNU/Linux 64-bit.
I use official 32-bit linux TB binary and
also build native 64-bit C-C TB binary for testing. I also use iceweasel (a
native Debian version of firefox) and/or firefox 64-bit version.)

I was worried that some malware started to produce these files, but
searching by google, these files may be performance profile data, especially
for memory usage produced for mozilla software.

The number of files is rather large, though, and I suspect that
C-C TB binary created locally and tested produce such files.
(But I am not sure.)
See the dir listing of /tmp below.

I wonder
- how I can stop creating such performance profile data being created and left
under /tmp, and
- how can I make use of the .fxsnapshot files to learn the memory usage(?) to
better lean the memory usage behavior of mozilla software (TB or FF?) that
produced the data.
Leaving a profile data is one thing, but make use of it is quite another.
It is rather disappointing to see data gathering is in place, but
a user/developer is not informed about how to take advantage of it.

TIA

cf. Listing under /tmp

ishikawa@debian-vbox-ci:/tmp$ ls *.f*
10170.fxsnapshot 40400.fxsnapshot 4533.fxsnapshot 5747.fxsnapshot
11010.fxsnapshot 4051.fxsnapshot 4541.fxsnapshot 5768.fxsnapshot
11148.fxsnapshot 4136.fxsnapshot 4554.fxsnapshot 5857.fxsnapshot
12009.fxsnapshot 4159.fxsnapshot 4556.fxsnapshot 5916.fxsnapshot
12089.fxsnapshot 4165.fxsnapshot 4570.fxsnapshot 5922.fxsnapshot
12161.fxsnapshot 4170.fxsnapshot 4633.fxsnapshot 6028.fxsnapshot
12903.fxsnapshot 4175.fxsnapshot 4653.fxsnapshot 6078.fxsnapshot
13305.fxsnapshot 4197.fxsnapshot 4670.fxsnapshot 6097.fxsnapshot
13468.fxsnapshot 4254.fxsnapshot 4683.fxsnapshot 6263.fxsnapshot
13669.fxsnapshot 4264-1.fxsnapshot 4731.fxsnapshot 6293.fxsnapshot
14438.fxsnapshot 4264.fxsnapshot 4734.fxsnapshot 6393.fxsnapshot
14473.fxsnapshot 4288.fxsnapshot 4735.fxsnapshot 6427.fxsnapshot
14493.fxsnapshot 4294.fxsnapshot 4772.fxsnapshot 6621.fxsnapshot
14520.fxsnapshot 4296.fxsnapshot 4783.fxsnapshot 6649.fxsnapshot
14549.fxsnapshot 4298.fxsnapshot 4800.fxsnapshot 6794.fxsnapshot
1455515202037.fxsnapshot 4305.fxsnapshot 4802.fxsnapshot 6930.fxsnapshot
1455619581155.fxsnapshot 4307.fxsnapshot 4885.fxsnapshot 7158.fxsnapshot
14657.fxsnapshot 4327.fxsnapshot 4920.fxsnapshot 7227.fxsnapshot
14684.fxsnapshot 4334.fxsnapshot 4956.fxsnapshot 7376.fxsnapshot
14716.fxsnapshot 4335.fxsnapshot 5001.fxsnapshot 7508.fxsnapshot
14737.fxsnapshot 4337.fxsnapshot 5114.fxsnapshot 7857.fxsnapshot
14822.fxsnapshot 4378.fxsnapshot 5157.fxsnapshot 8134.fxsnapshot
14828.fxsnapshot 4380.fxsnapshot 5221.fxsnapshot 8164.fxsnapshot
14903.fxsnapshot 4439.fxsnapshot 5227.fxsnapshot 8165.fxsnapshot
14938.fxsnapshot 4468.fxsnapshot 5239.fxsnapshot 8225.fxsnapshot
15101.fxsnapshot 4475.fxsnapshot 5314.fxsnapshot 8230.fxsnapshot
17946.fxsnapshot 4482.fxsnapshot 5438.fxsnapshot 8446.fxsnapshot
23678.fxsnapshot 4493.fxsnapshot 5449.fxsnapshot 9186.fxsnapshot
32008.fxsnapshot 4528-1.fxsnapshot 5488.fxsnapshot 9197.fxsnapshot
32089.fxsnapshot 4528.fxsnapshot 5642.fxsnapshot