Firefox toolbars: check
Thanks to the Captain’s universe howto it was not so difficult to create my own toolbar for Firefox. This is good news for the site I’m developing right now. Part of the design revolves around the ability to open a popup window related to the page you are viewing, and doing this with a javascript bookmarklet is more portable but also very difficult to get to work, due to all the overzealous popup blockers doing their business. With the toolbar these problems go away, and things work much more smoothly. Too bad it only works on Firefox, so there is still Safari and IE to explore.
Sorry, no links yet to the site or the toolbar, as all of this is still very much under development.