memo on the pc failed to load after upgrading to firefox 40 beta 1

I use firefox to access and edit my iCloud Memo on the PC. Today I upgrade my firefox from 39 beta 7 to 40 beta 1 and I found that I couldn't access the memo the the browser. However, if I use Chrome, it worked fine. When I rolled back to firefox 39 beta 7, it all works fine.

My firefox showed too much recursion on the java.

How to solve this problem?