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by beagle3 5000 days ago
This isn't really good practice, unless you revise your cookie on every page load to make sure it is still correct; e.g. restoring an ipad2 backup to an ipad3 will leave you with the wrong images for the next 10 years.

And an OLPC-style device might have different ratios if you're browsing using the e-ink display rather than the lcd.