Bug when clicking the bell icon

[madamebossgio]

Every time I try hovering or clicking the bell (notification) icon it completely freezes and says ''This page is slowing down Firefox. To speed up your browser, stop this page.'' I honestly don't get this it was working fine and dandy up until late last night and now it just keeps doing it,  I've tried clearing cache, cookies etc and it keeps doing it.  I can access the rest of Fiverr but as soon as I hover or click the bell icon it freezes and the website dies on me and my fans start ramping up like it's trying to be NASA's new super computer.