Comment 0 for bug 1503026

I wasn't doing anything special at the time, and then I suddenly saw this error in my Firefox console log:

20:54:52.159 Handler function NRL_getSecurityInfo threw an exception: TypeError: this.transport is null
Stack: DSC_send@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/server/main.js:1334:5
NEA_addSecurityInfo@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/server/actors/webconsole.js:1924:5
NRL_getSecurityInfo@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/toolkit/webconsole/network-monitor.js:273:5
makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/DevToolsUtils.js:83:14
NRL_onStartRequest@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/toolkit/webconsole/network-monitor.js:227:5
Line: 1334, column: 51 DevToolsUtils.js:59:0

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OS Information:

    No LSB modules are available.
    Distributor ID: Ubuntu
    Description: Ubuntu 15.04
    Release: 15.04
    Codename: vivid
    Flavour: GNOME
    GNOME Version: 3.16

Package Information:

    firefox:
      Installed: 41.0.1+build2-0ubuntu0.15.04.2
      Candidate: 41.0.1+build2-0ubuntu0.15.04.2
      Version table:
     *** 41.0.1+build2-0ubuntu0.15.04.2 0
            500 http://archive.ubuntu.com/ubuntu/ vivid-updates/main amd64 Packages
            500 http://archive.ubuntu.com/ubuntu/ vivid-security/main amd64 Packages
            100 /var/lib/dpkg/status
         37.0+build2-0ubuntu1 0
            500 http://archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages