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

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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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