|How To Disable Yahoo Ads In Your Yahoo Mail Inbox?|
This technique only works in Google Chrome. If you don't have one, you can download here.
Then go to the extension setting in your Chrome by clicking the "spanner" icon and click "extensions".
Next, click on the "Webmail Ad Blocker" option and open the Yahoo Mail tab.
Then, uncheck the "Advertisements" and it will automatically saved. Finally, refresh your Yahoo Mail tab to see the changes! Now, the ads will gone forever!
This extensions also works for other mail like GMail and Hotmail.