Freezing under firefox

Hi, I have my firefox (on windows) frozen very often. THis normally happen in one of two situations: 1) using the flashcards. 2) changing listening or reading numbers for an assignment.
Is anyone having the same problem?

Trava uns segundos e entao volta ao normal…

In my case, sometimes it doesn’t come back and I need to kill the process.


we know about this issue, it happens not very often, but it is really annoying. We’re going to address this issue as soon as possible.

Thanks for reporting.