OSX Yosemite 10.10.1 , Sophos 9.2.2, engine 3.55.0 threat data 5.11.
Not going to bother trying to re-type a very long description about how to reproduce this since the forum HTML checker zapped my first attempt completely, no I didn't use any HTML but had a couple of round braces and a greater than sign. :smileyfrustrated:
Short version without dodgy characters: when downloading large .ts files of 2 gigs or so Firefox will after a whle, maybe 30 mins, hang, and the SophosWebInt process will take 100% CPU, and gradually eat up all your memory. The first screenshot is from when Firefox hung, the second from 90 mins later, notice the process size difference.
Easily reproducible, only solution is to reboot as restarting Firefox doesn't help.
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