Just as a note for this version, version 1.5 only supports Firefox 1.5 on Windows; Mac support is only for Firefox 1.0. While the previous author discovered that Lektora 1.0 crashed Firefox 1.5, this current version only caused an error message to appear for me and could at least be uninstalled fairly simply.

Looks promising on Windows (I need something like this for IE6 users at work) but it's not much use for the Mac at the moment if you are using an up-to-date version of Firefox. Shame.