There were several Commits in the TextSecure-Browser-Plugin (see also the old blog) on GitHub.
I merged them with my fix for the message times and made a new package.
The most visible change is, that the conversations now happen in the main window as well (you might have to make it a bit broader).
Attention: This is still a developer’s version and use on the normal server as well as using it in daily live is discouraged. Anyways: I think beta testing is fun!
If you spot bugs, please consider reporting and/or fixing them and submit a pull request on the GitHub page.
You’ve been warned – download here: textsecure-dist-2015-08-29