Bug#639837: UI hangs for 30s while loading pages

[Luc Maisonobe]

Hello,

I confirm the same freeze occurs here, also since around christmas.
Looking into xsessions-errors, I get different messages. The one that
may help you is:

/usr/lib/xulrunner-9.0/plugin-container: symbol lookup error:
/usr/lib/xulrunner-9.0/plugin-container: undefined symbol:
XRE_InitChildProcess

It is repeated several time. The freeze seems to occur when some scripts
are in the page, I also got messages saying a script on a page never ended.
It also seems after a freeze with several open tabs, the system
monitoring shows up several zombie plugin-containers processes. I was
not able to identify which plugin.