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At first I tried running Firefox normally on Ubuntu 14.04 after a power cut that occurred while the computer was on suspend mode, and Firefox didn't start. I followed these instructions by renaming Firefox, but still no result. I tried updating, removing, re installing and nothing works. The error from running it from the terminal is as follows:

(process:12919): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
(firefox:12919): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised
(firefox:12919): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised
(firefox:12919): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised
(firefox:12919): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised
Could not create gnome accelerators directory `/home/nautilus/.gnome2/accels': Permission denied
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  • I am pretty sure this is helping: askubuntu.com/a/617459/72216 In most cases, local files are damaged. OP there mentioned it was the solution, in spite of not accepting (therefore I can't mark it as a dupe :) ) – Jacob Vlijm May 9 '15 at 13:06
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    Did it, Removed the /.mozilla folder, and reinstalled mozilla – Osama Salama May 9 '15 at 13:34
  • It works? if not, don't forget to log out/in after removing the local folder. – Jacob Vlijm May 9 '15 at 13:37
  • @JacobVlijm done, and checked, same error results (process:13759): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed – Osama Salama May 9 '15 at 13:53
  • @OsamaSalama that message is completely normal when you run Firefox from the terminal. – Jacob Vlijm May 9 '15 at 14:10
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Try typing this at the command line: (assuming your username is nautilus)

sudo chown nautilus /home/nautilus/.gnome2

You will be asked to provide your password. This is the password you use to login.

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  • I don't know why you got downvoted here. I gave you a +1 as you fixed what he was looking for. Good straight forward answer. :) – Terrance May 19 '15 at 14:02
  • Is there any way to tell who downvoted me I wonder... I was kind of wondering myself. – Daniel May 20 '15 at 19:20

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