Tease 作者： glodfinch

https://gitlab.com/glodfinch/tease
Adds extra information about tea prices to various websites.
Works on:

Awazon
Bitterleaf
ChaWangShop
Chen Sheng Hao
Essence of Tea
Farmer Leaf
Fullchea
KingTeaMall
Liquid Proust
Purple Cloud Tea House
TheTea.pl
West China Tea
WhatCha
White2Tea
Wuyi Origin
YeeOnTea
Yunnan Sourcing

On Firefox, you'll need to grant permissions to access the website data. When on the website, right click the extension and always allow. Or go to the extensions section in the add-ons page and grant all the permissions.
Weight and price data is extracted from the page with regex, so while it works on the majority of listings, occasionally it won't be able to parse the text. Feel free to raise an issue if you find any that don't work.