There's been some heavy rewriting going on.
After you log in, you'll have all the permissions, so feel free to experiment, but with caution and expect failures.
You can pick your favourite Firefox extension, add a project from the project list and and use the xpi, as a source for texts and for translation (web link, or upload, whatever).
The speed is really improved and the translation process is really easier now. You just open the translation page, start translating and the translation is saved automatically as soon as you move to the next text. You can use the tab key to move forward.
Use scroll to load more texts. Or press the more button.