Bundled Flash

[Mads Villadsen]

There are several options for uploading multiple files from browsers -
and the latest versions of all modern browsers support multiple file
selection.

A random example is this one:
https://github.com/blueimp/jQuery-File-Upload

With information about browser support here:
https://github.com/blueimp/jQuery-File-Upload/wiki/Browser-support

So it should at least be possible and I would assume that most
(active) projects will be slowly moving away from their current
flash-based solutions.