I am not sure how much I can express my love for this extension. This extension has helped save me so much money that I would not know that I was spending without it. I helps me know if items are actually on sale or whether there was deceptive practices to manipulate consumers into doing things that they may not fully understand. I am someone who tries to live as transparently as I can and this helps me understand consumer practices and allows me increase my spending power on ways that would benefit myself and my community rather than naively falling for marketing and corporate tactics.

いつも使っていて便利

This isn't really an addon. it's a shortcut..

Please, add amazon.pl. Doesn't even need to have language support itself (just like .fr/.it/.es) but would greatly help with browsing there.

Masterpiece

Been using this for years. Love it! Very useful! Well designed.

Intrusive plugin with a mediocre UI. Doesn't even work on most amazon products. This plugin is only here to grab your data.
Avoid it.

Does not work. Installed on latest firefox and win 11, No chart shows up on amazon.com or amazon.ca product pages.

Will support for amazon.nl (Dutch) be added to this extension in the future?

Wonderful add-on to see what the previous prices really were. I'd even love to have a link next to the Amazon price that scrolls down to the keepa chart.