The smart-card based banking systems I am aware of don't run in the browser (not saying they couldn't have chosen to work via a plugin, they just don't seem to)

The smart-card based banking systems I am aware of don't run in the browser (not saying they couldn't have chosen to work via a plugin, they just don't seem to). Gnucash has for several smart card systems, and at least HBCI/Fints support is good [1,2]. [1]: http://www2.aquamaniac.de/sites/aqbanking/overview.php http://www2.aquamaniac.de/sites/aqbanking/overview.php [2]: http://wiki.gnucash.org/wiki/AqBanking http://wiki.gnucash.org/wiki/AqBanking