Bit Shift (bitshift)'s status on Monday, 25-Jun-12 17:21:09 UTC
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@ecmc Avast is the biggest red flag there. As one bundled with an antivirus package, it's both the most probable one to have suddenly had a silent update, and the most probable one to be coded badly. My second guess would be a tie between ABP and Greasemonkey; GM itself is coded well enough, but some of the scripts run via it can be real hogs; whereas ABP has run into genuine memory leak bugs in Firefox before, so it's entirely feasible it might have done it again.