Works great on the current Yahoo Mail. However, I'm using the Beta version of the new Yahoo Mail and it doesn't really work on that. The right ad panel is sometimes hidden (but the space still shows) and sometimes isn't, while the top ad panel shows all the time. However, I would imagine that once the new version of Yahoo Mail goes wide, there will be an appropriate update to the add-on.

This app works great - Quick updates when Yahoo changes it's system.

Was having trouble getting uBlock Origin to hide the big ad blank space, this solved my troubles!

gregbanks2 is right … the applet used to be reliable … now, ymhap has stopped working. currently using firefox(64bit) 51.0.1 version … since the applet stopped working, now ⅓ of the screen has been taken away. can you pls fix? both firefox and ymhap were freshly installed today.

thanks for your courtesy, piyush.

until late Jan17 Firefox update.