Firefox Community Forum

I have an issue with Firefox 127 not accepting a session cookie that I use for user authentication. I have an ASP.NET application with a login form that includes fields for login and password, and a submit button. When the button is clicked, an HTTPS/POST request is sent to the server. The server responds and sends back a session cookie named .Cookie.Name with the parameter httpOnly set to true.

When I check in Firefox's Developer Tools under the Network tab, I can see .Cookie.Name in the server response. However, in the Developer Tools under the Storage tab, .Cookie.Name is missing, which prevents the user from logging in. This problem does not occur in other browsers like Chrome or Edge, nor does it occur in Firefox version 126. The configurations for Firefox 126 and 127 are identical.

Could you please assist with this issue?

Recently, I cleared the cookies and site data from my browser as I'd noticed they were taking quite of lot of space on my harddrive. I thought clearing them would just reset them, but it looks like they were completely wiped instead.

Now, the browser never remembers any login information, so I have to connect to every site I use everytime I open my computer. It's troublesome when some of them have double verification and I have to go through the trouble of checking my email and entering a code everytime. The websites don't ask me to enable cookies again, so I don't know how to make them remember my informations again.

Is there a way to re-enable cookies, or have the websites ask me to enable cookies again?