Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseReview for English (Australian) Dictionary by Ron Francis
Rated 4 out of 5 stars
Would be good if installing also made it your default dictionary, or at least, warn you that you have to do it.
I had this installed for a long time without knowing. and wondered why it wasn't working.
To create your own collections, you must have a Mozilla Add-ons account.