[tbb-bugs] #20746 [Applications/Tor Browser]: TBB - What are /tmp/0123.mlf files (where 0123 is PID of Firefox)

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Nov 23 00:01:21 UTC 2016

#20746: TBB - What are /tmp/0123.mlf files (where 0123 is PID of Firefox)
     Reporter:  ronvandaal_               |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
 Using tor-browser-linux64-6.0.6_en-US.tar.xz

 This is a general question, but related to the other ticket #200100

 In /tmp/ I found some files (*.MLF) , filename is the PID of Firefox.

 (for example, the process "0123 ./firefox --class Tor Browser -profile
 TorBrowser/Data/Browser/profile.default" relates to /tmp/1234.mlf)

 What are MLF files? Never seen them before. They appeared after a TBB's
 browser crashed and couldn't restart due to a faulty Browser/libxul.so.

 Anyway. They seem memory dumps. But why?

 (2268780 bytes) First bytes header (if any) starting with 010100790a2a21

 Example of readable contents:

 $ strings 0189.mlf

 Ideas? Anyone?

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20746>
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