I insalled this after getting pissed off with reviewmeta.com, which seems to be completely moribund and buggy as hell now.

On the face of it this Fakespot extension is a much better bet. I can see the review ratings right there on the Amazon listings and, with Mozilla behind it, I can be relatively certain its:

A: safe to use.
B: updated regularly.

Unfortunately, the reports generated aren't helpful at all—hence my 2-star rating. The extension will give a product's ratings a grade. But there's no information as to how this grade was arrived at. Even clicking through to go onto the Fakespot site and read the in-depth analysis leaves me none the wiser. It just seems to summarise various highlights taken from the reviews [which, in the case of Amazon, is now done by Amazon themselves anyway].

The extension would be a hell of a lot more useful, if it explained WHY a product's reviews were graded low quality. For example, ReviewMeta [when it works] elaborates on this by showing [for example]; that X% of reviewers have only ever reviewed this product, that X% of reviews contain the exact same phrases that X% of reviewers give any product they review a 5-star rating, etc. etc.

C'mon Mozilla. Act like you're sitting an exam here and show us your working out as well as your answers!