new mail indicator
I keep getting new email indicators even though I've opened up & read the email. This has been going on since you've "updated" yahoo email. Im seriously thinking of moving all my yahoo email to Gmail & deleting my yahoo email account.
1st
ranked

Have you tried general browser troubleshooting or a different browser? If not, please try these steps to fix this issue: https://help.yahoo.com/kb/sln2891.html