Rated 5 out of 5 stars

I have reviewed this add-on before in June 2009 but re-reviewing as I see a lot of people are having compatibility problems, however it works (and always has) fine for me.

It worked on Fx 2 versions, Fx 3.0.x versions and also Fx 3.5.x versions. At the minute I am using Firefox 3.5.3 [Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3] and it's working perfectly - it also installed perfectly!

The *only* problems with installing I have had is one time when many add-ons would not install from AMO (don't know why) but it did the next day. I have always used it on Windows XP and Vista using the en_US version bar a couple of times I used the en_GB version, dictionaries installed on that too and it would NOT install on an old Netscape Navigator (9.0.0.6) either. Best bet is to ask for help at the MozillaZine forums.

I still maintain it is an excellent dictionary. It does need an update as dictionaries are constantly being amended and added to but this contains more than enough to get by for day to day usage. You might need a more comprehensive one if your into writing essays for collage / university etc.

This review is for a previous version of the add-on (1.19).