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CloseReview for British English Dictionary by RedDwarf
Rated 4 out of 5 stars
@Jillie Ace
It is for spell checking text boxes/web forms etc. After installing any incorrectly entered text in text boxes and web forms are underlined and if the word is highlight and right clicked a menu shows with suggested corrections.
There is a spellbound extension which improves spellchecking and makes it more like older versions of FF as they used spellbound too.
https://addons.mozilla.org/en-US/firefox/addon/9207
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