There is a change in Firefox 96 related to cookies and insecure sites.

• https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/96#http

See also:

• /questions/1363998 blocked 3rd party cookies

As a workaround for now you can modify this pref on the about:config page to revert this change.

• about:config => network.cookie.sameSite.laxByDefault = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

• https://support.mozilla.org/en-US/kb/about-config-editor-firefox

I thank you for your reply but I do not understand what I should do. I am not very computer literate and therefore not sure what you are telling me what I should do.

You should pick a site that's has a saved password in Firefox. Go to the site and verify that the password Firefox is using is correct. I had this issue for sometime with Amazon because Firefox kept putting in a generated password. I had to delete the password from the manager and save it again.

Example in the screenshot is from Comcast. I can click on the "View Saved Logins" to verify the password used.