And don't forget the end-to-end project[1], which is the javascript crypto library by google.
The significance of these types of project extend beyond browser privacy. As crypto-currency become more prominent, we NEED better, carefully auditted javascript crypto-libraries.
Right now, all the crypto-code are home baked. e.g.: https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/src/e...
While, I think they are all doing a fine job. It is not settling to think that these mission critical, crypto-code is not vetted by cryptographers.
In fact, a few months ago, there was a bug where the nonce for each signature was not set properly that basically meant you were able to work out the private key for 2 different signatures. Some users lost funds due to the bug.
These open initiatives will lay an important foundation.