In my case, I have not installed any more libraries, than the ones I already had with Firefox or Seamonkey.
Also sometimes I do not boot, but if I run first firefox or seamonkey the previous version and close it. It always starts me.
Here doing tests with virtuaadresslimit 512, I got this error in a trp that seems interesting
. It says memory failure, js, see the attachment. and do not start.
The previous version of seamonkey, can work with 512