Amazon Review Counter

A lightweight browser extension that displays the character and line count in real time in the top-right corner while you write Amazon reviews.
By keeping track of the count, it helps you write clear, easy-to-read, and effective reviews.
It’s also handy for setting your own character-count targets for Amazon Vine reviews.

Note: From version 2.0, this extension now supports not only Amazon.co.jp but also Amazon.com and Amazon.co.uk.

Note: Character counting behavior varies slightly depending on the display language:
- Japanese: Line breaks and spaces are not counted.
- English (Chars): Spaces are included in the character count.
- English (Words): Counts the number of words.

・Main Features
- Displays the number of characters and lines in the Amazon review input field.
- Also shows counts on existing reviews on product pages.
- In the options menu, you can configure the threshold for visual changes, counter display size, and display language (Japanese / English).
- In English mode, you can choose to display either character count (Chars) or word count (Words).

・Pages Where the Counter is Displayed
This extension supports the following pages on Amazon.co.jp, Amazon.com, and Amazon.co.uk:
- Review creation page（/review/create-review）
- Review edit page（/review/edit-review）
- "Write a review" page from purchase history（/review/review-your-purchases）
- Review sections on product pages（/dp/、/gp/product/）
- Full review listing pages accessed via "See all reviews"（/product-reviews/）
- Individual review pages（/review/R*、/gp/customer-reviews/）