Well spotted Superpilot - something I'd missed
from
https://www.google.com/intl/en/toolbar/ff/
"Google Toolbar for Firefox has been discontinued
For details, see the announcement. There will be no further updates or security fixes to Google Toolbar for Firefox. For this reason we strongly recommend discontinuing the use of the toolbar. Also see our Help Center for suggestions on add-ons and built-in browser features that provide functionality similar to the toolbar.
We’d like to thank everybody who used Google Toolbar for Firefox and helped us make it a compelling product"