Dust-Me Selectors 2.2 and Firefox 3.6

“Dust-Me Selectors 2.2 could not be installed because it is not compatible with Firefox 3.6”. Please, upgrade.

And the question is… ?

You’ll just have to wait for Dust me selectors to be updated to the latest version. When FF 3.5 came out, it took a while for it to be updated too.