Despite being quite slow, the editor looks nice. I first tested it on a tiny job (4 segments) and all fine. When I tried using it on a bigger job (1000 segments) the browser tab froze forever with the "Processing.. please stand by" message. Even worse the WordBee tab freezes too, so I have to close it all. After that it was impossible to open the translation UI again.
When trying to load the page, after some time, the console shows: "Failed to clear temp storage: It was determined that certain files are unsafe for access within a Web application, or that too many calls are being made on file resources. SecurityError"
This is Chrome Version 53.0.2785.116 (64-bit) under Linux.
It worked fine under Firefox.