I've been using keepa.com for years and really like it, but the add-on doesn't appear to work, at least out of the box. Reading some comments it seems I might need to lower some security feature for it to function but none of the things I tried worked.
If the add-on needs extra steps to actually work, that should be mentioned on its front page and/or app settings!
Also, I'd expect at least clicking the add-on icon while I'm on a product page would go to Keepa's pricing history on that product at least, but it just loads my tracking list.
So, right now, the add-on has no use at all for me, unfortunately.

値段の比較　増減　色々分かる素晴らしい

It works great, but only on the american amazon website. Being Australian, it doesn't seem to work with the .au variant of the website, which is a big deal breaker for me.

No funciona en la última versión de firefox para Android

Estensione molto utile, ti consente non solo di monitorare l'andamento dei prezzi ma anche di ricevere alert personalizzabili sui prodotti, avere un confronto diretto tra ebay e amazon e infografiche su prodotto e venditore

Muy útil aunque a nivel estético tiene margen de mejora.

Seems cool so far, but getting it to show was a bit tricky. Allowing http(s)://keepa.com in the Cookie exceptions did not do the trick - I had to turn off FF's tracking protection for my local Amazon site. Wish that could have been prevented.

It's working great on Windows. But why is it not working with Firefox for Android (daylight) anymore?

buona esperienza per programmare acquisti.

便利です