shmget (No space left on device) issue with firefox

[Beeblebrox]

I have been having difficulty getting firefox to work, so I built it with
DEBUG and this error shows up when starting with "$ firefox -safe-mode" =>
"shmget failed: error 28 (No space left on device)"

What "Shared Memory" setting do I need to change so as to get rid of this
error? Alternatively, is this a mozilla bug? shmall looks sufficiently large
to me, and setting it to "unlimited" seems a bit risky.

My Shared Memory settings ATM on 4G physical RAM:
$  ipcs -M
shmmax:    536870912
shmmin:            1
shmmni:          192
shmseg:          128
shmall:       131072

MEMORY INFORMATION:
mem_wire:        1543798784 (   1472MB) [ 39%]
mem_active:  +    451334144 (    430MB) [ 11%]
mem_inactive:+   1510998016 (   1441MB) [ 38%]
mem_cache:   +            0 (      0MB) [  0%]
mem_free:    +    378961920 (    361MB) [  9%]
mem_gap_vm:  +      1544192 (      1MB) [  0%]
-------------- ------------ ----------- ------
mem_all:     =   3886637056 (   3706MB) [100%]
mem_gap_sys: +    123482112 (    117MB)
-------------- ------------ -----------
mem_phys:    =   4010119168 (   3824MB)
mem_gap_hw:  +    284848128 (    271MB)
-------------- ------------ -----------
mem_hw:      =   4294967296 (   4096MB)






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FreeBSD-11-current_amd64_root-on-zfs_RadeonKMS
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