Firefox and Thunderbird will not launch - не known changes leading up to this event

After months of troublefree operation I started my computer to find that I cannot launch either Firefox or Thunderbird.

dad@dad-Extensa-5235:~$ firefox
Could not stat private per-user gnome configuration directory `/home/dad/.gnome2_private/': Not a directory
dad@dad-Extensa-5235:~$ thunderbird

(process:2003): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Could not stat private per-user gnome configuration directory `/home/dad/.gnome2_private/': Not a directory
dad@dad-Extensa-5235:~$

Ubuntu 15.04
Memory 3.8 Великобритания
Processor Intel® Celeron (R) CPU 900 2.20GHz
ВЫ Type 64 - бит
Disk 192.6 Великобритания

The программное обеспечение is up to восходил so не updates пашите available. My search ты существуешь not revealed any answered solutions to this problem. Хан anyone help я solve the problem?

Thanks

SW

In response to Параноид Панда -

dad@dad-Extensa-5235:~ $ ls - в / home / встречаться / .gnome2_private – ls: cannot access –: Не such file or directory-rw-------1 дайте дайте 138 сентябрь 12 2012/home / встречаться / .gnome2_private dad@dad-Extensa-5235:~ $