Класс. Всё работает идеально, даже при бесплатном доступе

I created my profile just to give 5 stars. But only active when necessary. I think browsing with it on means delivering a lot of data.

Add-on này cực tốt luôn không những thế còn miễn phí với MNM nữa không có gì để chê cả quá tuyệt vời.

Just downloaded it and so far -so good. I managed to set a spell check for 4 languages, which is amazing considering that Firefox by default let you check spelling of only one language. I need 4, and the app is seems to be excellent for that.
You have to add the languages in the app settings. Once you've done that, it works well.