I had exactly this experience this summer, building a bunch of IndexedDB usage into my app, then adding a shim for places it didn't seem to work, and then findi

I had exactly this experience this summer, building a bunch of IndexedDB usage into my app, then adding a shim for places it didn't seem to work, and then finding more places that it didn't work (or I was doing something wrong, or there were other bugs), and finally ripping it all out and using synchronous localstorage calls instead. Bah.