Copy the clean URL of Amazon product pages
When you're showing Amazon's product page like...
https://www.amazon.com/What-Every-Thinks-About-Apart/dp/1849531986/ref=sr_1_1?crid=... (very long URL)
You can get following URL to your clipboard from context (right-click) menu.
https://www.amazon.com/dp/1849531986/
This URL clearly does not include any tracking IDs, affiliate tags and other noisy parameters.
This extension works on Amazon.com, international Amazon sites such as Amazon.co.jp, and Rakuten Ichiba.