Rated 4 out of 5 stars

Great little addon! My only wish is that I could assign about:me to appear every time I open a new tab!

This review is for a previous version of the add-on (0.5.1-signed.1-signed). 

You can probably install NewTabURL (https://addons.mozilla.org/en-US/firefox/addon/newtaburl/) and just set about:me as your custom URL for new tabs.