This is not an active bug, but a "heads up" notice I recently ran into.
Describe the bug
Firefox Developer (76) and Nightly (77) display a warning if one logs into the Panel, see Console output below.
This indicates that login into the Panel might be broken in upcoming versions of Firefox.
It might only affect http connections.

To Reproduce

1. launch Firefox Developer or Nightly Edition (currently on version 76/77)
2. open DevTools (F12), activate Console and enable "Warnings"
3. navigate to a Kirby panel login screen and login over http (e.g. localhost)
4. See warning in browser console

Expected behavior
no warning :)

Kirby Version
3.3.4

Console output

Cookie “kirby_session” will be soon rejected because it has the “sameSite” attribute set to “none” or an invalid value, without the “secure” attribute. To know more about the “sameSite“ attribute, read https://developer.mozilla.org/docs/Web/HTTP/Cookies

Desktop (please complete the following information):

• OS: Win10-pro
• Browser: Firefox
• Version: 76 and 77