We have no plans for a browser plugin, for the same reasons given here.

A web player was once planned some years ago, but then 3rd party players came out, like OSA Kit. OSA Kit worked quite ok as we tested it, so we didn't see a demand anymore for developing an own web player.

Contrary to rumors, a web player is not "quickly" and can not make games appear "without needing to download". It's advantage is just that your game runs in the browser, not in its own window, and installation happens behind your back. If you need that, just use an existing web player.