Comment 1 for bug 244439

Two things would help to diagnose the problem:

1) Go to Tools->Error Console, and enter the following in the "Code"
textbox at the top (as one line) and press enter. It will add a line of output to the error console, eg "x86-gcc3"

    Components.classes["@mozilla.org/xre/app-info;1"]
      .getService(Components.interfaces.nsIXULRuntime).XPCOMABI

2) Create a new profile, install Weave, exit Firefox. Then delete *.dat and extensions.cache from your profile, and launch firefox via:

    strace -f firefox > ~/stracelog.txt 2>&1

   Let Firefox come up, then quit. You may need to Control-C in the terminal to end the strace. Attach the stracelog.txt here (note that if you didn't start with a clean profile, there could be sensitive data in the trace).