I am using Windows7 / Firefox 39.0 and when I go to the reputation graph page to select the timeline, it doesn't work the way it should i.e. the zoom feature is not working in the upper chart when the timeline is selected in the lower chart. Chrome and IE11 do not have any problem with that.
I tried to find out any add-on issue by opening Firefox in safe mode. But I am getting this issue again.
In the below image, I have released the mouse multiple times.