Review for Dictionary Switcher by Tobias Kuban
Rated 5 out of 5 stars
Works like a charm with my "Deutsches Wörterbuch (de-DE), alte Rechtschreibung" Add-on. https://addons.mozilla.org/addon/deutsch-alte-rechtschreibung/
This review is for a previous version of the add-on (1.3.1.1-signed.1-signed).To create your own collections, you must have a Mozilla Add-ons account.