If you are accessing yahoo account in your desktop and if users are facing problem while remove ads from yahoo mail then they can overcome from this by using some steps: Users need to Enable ads block extension in their browser.
1. open browser > go to ad block site > click on add block ad on the browser
2. Ad block extension will add in your browser that will see on the right side of the browser.
3. After that click on setting
4. click on first list option.
5. Easy list option should be checked.
After doing all these when you will open browser ad will not seen on screen.