Greasy Fork

Amazon URL strings containing a search query are removing one of the ampersands in the querystring, which breaks the search results if you use your browser's back button.

Broken URL:

https://www.amazon.com/s?k=iphone+16+pro+512gbsprefix=iphone+16+pro+512gb%2Caps%2C251

Working URL:

https://www.amazon.com/s?k=iphone+16+pro+512gb&sprefix=iphone+16+pro+512gb%2Caps%2C251

Note the ampersand before sprefix.

I just noticed the same thing breaks other URLs, like this store URL linked from a product page:

Broken URL:

https://www.amazon.com/Amazon-Renewed/b/ref=bl_dp_s_web_12653393011?node=12653393011field-lbr_brands_browse-bin=Amazon+Renewed

Working URL:

https://www.amazon.com/Amazon-Renewed/b/ref=bl_dp_s_web_12653393011?node=12653393011&field-lbr_brands_browse-bin=Amazon+Renewed

Note the ampersand before the field parameter of the querystring. So something isn't re-concatenating the querystring properly.