This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Have you tested web workers with the major mobile browsers, such as the stock Android browser, or Mobile Safari? I'd be worried about those browsers running out of memory, or lacking the horsepower to perform background tasks. Thank you.