Firefox has a known issue with using the numeral 1 as an access key shortcut, a bug that has been present through several versions of the browser. Essentially Firefox sees the 1 key as being shifted when it is used. As access key 1 is usually reserved for the home / index page, the solution is to create an alternate access key link to the home page with the exclamation point (i.e. a shifted 1) as the shortcut. This is easy, as the home page is usually linked to at least twice on every page: once in the navigation bar, and once in the <h1> element. An example would be:

1. <h1><a href="index.html" accesskey="!">Brobdingnagian Corporation</a></h1>
2. <ul id=”nav”>
3. <li><a href=”index.html” accesskey=”1”>Home</a></li>
4. <li><a href=”about.html” accesskey=”2”>About</a></li>
5. <li><a href=”map.html” accesskey=”3”>Site Map</a></li>
6. <li><a href=”search.html” accesskey=”4”>Search</a></li>
7. <li><a href=”help.html” accesskey=”0”>Help</a></li>
8. </ul>

Firefox will interpret any use of the 1 key as an exclamation point, and use the access key attribute in the link around the h1 content; all other browsers will use the normal 1 shortcut provided by the link in the unordered list.