This release brings the following new features:

• New backend: Emscripten: The Emscripten backend lets you mount an Emscripten file system within BrowserFS. Thanks to @Narazaka for the initial code and the idea!

There are also a number of important bugfixes+optimizations:

• OverlayFS: Fixes a serious bug in deletion logic that prevented you from deleting a file, and then re-writing it later. Also includes logic to prevent your code from manipulating the deletion log.
• OverlayFS: readFile optimization when used with an XmlHttpRequest backend, which is a common case; avoids a round-trip to the server to determine the size of a file. Thanks, @bpowers!