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Restart becomes Not Responding, kernel Data/Stack execution not permitted: firefox[pid 5397] at virtual address 0x130656000, protections were

Trying to restart (after upgrade to Mac 30.0) and load previous session (via an addon session manager)

FF becomes "Not Responding" and Console shows repeated lines of:

6/11/14 1:08:15 AM kernel Data/Stack execution not permitted: firefox[pid 5397] at virtual address 0x130656000, protections were read-write

Trying to restart (after upgrade to Mac 30.0) and load previous session (via an addon session manager) FF becomes "Not Responding" and Console shows repeated lines of: 6/11/14 1:08:15 AM kernel Data/Stack execution not permitted: firefox[pid 5397] at virtual address 0x130656000, protections were read-write

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