strace tells me, that firefox freezes here: connect(54, {sa_family=AF_INET, sin_port=htons(16001), sin_addr=inet_addr("127.0.0.1")}, 16 -- Long startup-time and instability https://bugs.launchpad.net/bugs/193935 You received this bug notification because you are a member of Mozilla Bugs, which is a bug assignee.