[Firefox] POST Request Failing Due to Two Cookies with Same Key

Tadashi Shigeoka ·  Sun, April 5, 2015

In Firefox, I encountered a situation where two cookies with the same key were set, causing POST requests to fail.

The issue was resolved by deleting all cookies for that site, but I still don’t understand how this situation occurred.

Since the login functionality wasn’t working, if this kind of bug occurs under certain conditions, users might never visit the site again.

That’s all from the Gemba.