This looks like a crash with the same stack signature as the crashes in bugs 1278165 and 1279089. They are all in libcairo which suggests somebody familiar with the linux graphics code should be taking a look. I'm not sure if I've got the right component but this should be closer to the proper place.
Component: Add-ons Manager → Graphics
OS: Unspecified → Linux
Product: Toolkit → Core
Bulk assigning P3 to all open intermittent bugs without a priority set in Firefox components per bug 1298978.
Priority: -- → P3
Seems to have stopped.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → WORKSFORME
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