Thank you Dropa. I appreciate your reply. I am sorry there isn't anything I can add other than the functions in Yahoo email - like blocking spam senders, deleting emails etc. do not work since I downloaded the latest version of Firefox. I am in my 70's, not real tech savy, and live in a remote location so there is no where I can go to for assistance. I wish I could provide more details other than the places where I place my cursor to delete etc. are unresponsive since the new Firefox was downloaded.

Thank you Dropa.

Firefox made some changes and downloaded a new version this morning that works perfectly as it is intended to do.

Yes I contacted Yahoo but the problem was not caused by Yahoo.

All is well. I doubt if you are most people would have known how to fix the problem in Firefox unless you were the programmer.