Comment 138 for bug 125970

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wkatze (wkatze) wrote : Re: slow scroll with image in the background

I've had a similar problem: The site had a few elements with a 1x1 pixel transparent background png and was not scrolling but jumping, continued to scroll a bit (was "laggy") and the cpu load jumped up to 100%. Changing the image size to 50x50 pixel fixed the problem.