The re-direction has got nothing to do with Firefox. You'll need to contact the site owner for any complaints. Note that both, AOL, and Yahoo now belong to a company called Oath, which is owned by Verizon.

thank you for the reply. However, I know the problem is not Firefox. As stated in my question, AOL has no contact but phone. Thus, I ask here in case somebody using Mozilla knows the answer.

To be clear...AOL from the Oath, Inc., page... Online, chat support is for paid members or use your Facebook or Twitter account. AOL email support is off due to high volume. Searching the Internet brings up nothing about my question in Google search results. The AOL Are You sure you want to sign out...page is new, and since it sends me to Yahoo India, It is not unreasonable to be concerned about hacking.