When I open in Firefox, I get the error "Your browser does not support HTML5 offline database storage. Please try using Google Chrome or Safari browser for this

When I open in Firefox, I get the error "Your browser does not support HTML5 offline database storage. Please try using Google Chrome or Safari browser for this Web App to work properly." This is a little misleading, because Firefox, Chrome, and IE 10 (but not Safari) all support IndexedDB, which is on track to be the W3C-recommended offline database storage API. Presumably this uses Web SQL Database, which is not a W3C recommendation and never will be because it attempted to standardize SQLite as the only way of implementing a database (http://www.w3.org/TR/webdatabase/ http://www.w3.org/TR/webdatabase/).