Thanks for this. I would love to see the bookmark dialogue pop-up when bookmarking though, in case I want to change the bookmark title and such. Thanks.
It is not currently possible to open Firefox's bookmark dialog via an extension, but the ability to change the bookmark title has already been added in the latest development version of BTH (see http://forums.mozillazine.org/viewtopic.php?f=48&t=3038053 for details).
