On Firefox 85.0.2 (64-bit) using my MacMini 2018, I get the message "Service Temporarily Unavailable" on any Amazon UK listing... I have tried several listings and get the same message. This add-on is nothing more than useless. However, the website is an amazing tool in itself - it's a shame the add on is not what is described.

UPDATE: No longer "love" this add-on. An upgrade to versions 3.x+ requires creating an account and signing in. This is a means to track ALL your amazon activity, not just the ones you manually set to price track, no matter what the T&C's say.

Note also how some other reviews say, "Latest update has the Camelizer icon showing on every site."

Untrustworthy.

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From ~2018: Love this app! It's like being able to put a limit-order on an amazon item. Getting a message when the price drops below a threshold is awesome. I sometimes buy an item 6+ months after I originally see and mark it on camelizer.

For those complaining about incompatibility, I have been through every update of FF for the last 1.5 years, and am currently on FF 58.0.2, and have successfully used this extension -- alongside ublock origin, print edit, video download helper, user agent switcher, and with and without flash or java.

the issue is that that icon in the toolbar is now missing and there's no way to get it on there. so, despite being labelled as working with firefox 57+, it actually doesn't. hopefully it gets fixed soon, it's pretty great otherwise