Adding Shortcuts to Yahoo! Mail

I find it annoying that Yahoo! Mail doesn't provide more keyboard shortcuts, especially for tasks performed all the time, like going to the previous/next message, or replying to an email. If you are using Firefox, you can fix this right now:

1. Install the Greasemonkey plugin (click on the link for the latest version in the box in the upper right section of the page)
2. Restart Firefox
3. Load my Yahoo! Mail Keyboard Short Greasemonkey script (click on this link)
4. Go to Tools / Install User Script and click OK

That's all. The available shortcuts are always displayed at the bottom of a page when you view an email. As shown in this screenshot.

Known bug: The shortcut list at the bottom of the page appears twice. If you figure why this is, please let me know!