Reset your browser back to default settings
If you've tried all the options in our browser troubleshooting article and Yahoo still isn't working, resetting your browser to it's default settings will resolve most issues.
When you reset your browser to it's default settings it will delete your bookmarks, remove all enhancements, and clearing any temporary internet files related to it.
Important - Be sure to save a copy of your bookmarks before you reset the browser.
Reset Yahoo supported browsers
If the issue persists and only occurs in one browser, contact the browser developer for further support.