very useful, it points out my grammar mistakes and it helps me find the meaning of words with the double click popup feature. but this feature doesn't work with reader view (firefox's reading mode). Please fix this!

very helpful

I like Grammarly for Firefox but I can't find the extension for Twitter. Grammarly claims there is an extension for Twitter but there is no way of accessing it. Grrr!

when I copied rom gmail and pasted to my facebook, it seems that parts of the text were recopied or corrupted.

Very Slow, no local chaching. Often updates and insets the corrected word into the wrong part of the text box.