Rated 2 out of 5 stars

I followed these instructions:-
To enable, right-click in a multi-line text box, select "Languages", then "English / United Kingdom"
It then switches to English (UK) for my message, BUT next time I type it's reverted to English (US)
Really annoying! I'm on FF v9.0 in Win7 64-bit

This review is for a previous version of the add-on (1.19.1).