User-Agent: Mozilla/5.0 (Windows; Windows NT 6.1; WOW64; rv:2.0b2) Gecko/20100720 Firefox/4.0b2 Build Identifier: Mozilla/5.0 (Windows; Windows NT 6.1; WOW64; rv:2.0b2) Gecko/20100720 Firefox/4.0b2 When watching a flash video (like an 1080p one from youtube) in fullscreen and holding down the Alt key, the video begins to stutter. Reproducible: Always Steps to Reproduce: 1. Open up a youtube video 2. Fullscreen it 3. Press and hold Alt key Actual Results: Video begins to stutter. Expected Results: Video does not begin to stutter.
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