One of the very few .. Rated 4 out of 5 stars
One of the very few Firefox add-ons to handle Firefox DOM storage. Works perfectly well.
My hopes for Xmas :
1- A toolbar button ;
2- A switch on the add-on's GUI to enable/disable DOM storage (at this time, only "dom.storage.enabled" setting in about:config) ;
3- Cherry on the cake : a whitelist for "permission to store" on a per-site basis.
I'm thinking of a whitelist rather than blacklist because sites that require dom.storage.enabled to be "true" are, in my experience, seldom. I encountered 2 sites that will not perform without DOM storage (be it with Firefox or IE) : wikimapia.org and geoportail.gouv.fr, , both mappers. Strange enough, both require DOM storage but neither stores whatever data !
EDIT: Firefox's about:home search engine feature won't run without DOM storage as well.
Thanks Santa, more seriously, thanks to the author(s) of "Foundstone HTML5 Local Storage Explorer"