A separate bug: highlights and sticky notes made using Diigo 3.1.6.13 in Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-GB; rv:1.9.0.10) Gecko/2009042315 Firefox/3.0.10 are not shown in Diigolet 3.1b523.
http://www.diigo.com/tools?client=ff Diigo Toolbar 3.1.6.13 (for Firefox) has no processor services. However: the actions and products of this version of the Toolbar are comparable to such services.
Provider. This type of service gives data to the calling application.