GTK_IS_WIDGET (widget)' failed

[Chris]

My hourly syslog snippet for the last hour was 3.8mb. I was full of the
paste at pastebin - https://pastebin.com/J1jAW5PR I don't know if this
is a cairo-dock, Firefox or some other issue. Any ideas would be
appreciated.

-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11972; -97.90167 (Elev. 1092 ft)
19:24:21 up 4 days, 11:16, 2 users, load average: 2.87, 4.35, 2.52
Description:	Ubuntu 16.04.2 LTS, kernel 4.4.0-67-generic
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