Issue: Mozilla Firefox - Crash Notification

Step-1: Open Mozilla Firefox.(Latest Version)
Step-2: I opened an online task management tool.
Step-3: Tried to open a functionality in another tab.(T-1)
Step-4: Tried to open another sub functionality in another tab(T-2) in T-1.
Step-5: Again tried open another functionality in another tab(T-3) in T-2.
Result: Got a Crash notification.

FYI: Tried same steps again, it was fixed. Don't know whether it was a fix/some issues from my side.