Android: https://play.google.com/store/apps/details?id=com.dengpai.aliprice
Firefox/Opera(AliExpress, Amazon, 1688, eBay, Shopee, etc.): http://aliprice.com/

Features:
✔ Price history chart, display price history within 3/6/12 mo.
✔ Favorites, add product to your favorites and receive a push drop alert when its price drops.
✔ Shortcuts and search box
If there are any problems or advice, just feel free to let me know. Email: lin@aliprice.com

Alibaba is a trademark of Alibaba.com, Inc. This extension was not created or endorsed by Alibaba.
We do use Google Analytics to collect anonymous usage statistics to help improve user experience, but you can opt out at http://tools.google.com/dlpage/gaoptout
We only collect anonymous information.
We use technologies like cookies (small files stored by your browser), web beacons, or unique device identifiers to anonymously identify your computer or device so we can deliver a better experience. Our systems also log information like your browser, operating system and IP address. For more details please read our Privacy Policy - https://www.aliprice.com/information/index?page=privacy