After my recent upgrade from 13.10 to 14.04 Firefox plugin-container eats 179% CPU, even after disabling all plugins and restarting the browser. Before the upgrade I did not have this problem, though Firefox performance was poor. Is this a known issue, or have I encountered something new? Am I the only one having this?
Had to shift over to Chromium as Firefox had become unresponsive, eating all of CPU and thus completely unusable.
I tested it last night with
firefox -safe-mode and the result was that my whole system become unresponsive for about 10 minutes, before I was able to log in via virtual console and kill the firefox process.