You can shim WebKit to use onupgradeneeded, https://github.com/matthewp/multientry-shim/blob/master/upgradeneeded.js https://github.com/matthewp/multientry-shim

You can shim WebKit to use onupgradeneeded, https://github.com/matthewp/multientry-shim/blob/master/upgradeneeded.js https://github.com/matthewp/multientry-shim/blob/master/upgr... There are still a few other things that it won't do (multiEntry, Blob storage to name a couple).