Review for Keyword Search by Tony Mechelynck
Rated 5 out of 5 stars
Thanks to this extension I don't need to change any settings to use the English Wikipedia when typing in the URL bar, the French Wikipedia in the Search bar and the aw<s>esome</s>ful bar, and DuckDuckGo on right-click.
I love it.
To create your own collections, you must have a Mozilla Add-ons account.