Sorry for my too long silence. I've tried the testcase I attached again. Curiously (for me), the required delay to get expected session data on environments are quite different: * Windows 10 21H1, Firefox 89.0: 80 msec * Windows 10 21H1, Nightly 91.0a1: 160 msec * Ubuntu 20.04 on VirtualBox, Firefox 89.0: 1067 msec * Ubuntu 20.04 on VirtualBox, Nightly 91.0a1: 2133 msec I still cannot find out what triggers this difference, but it looks to be depending on its running environment.
Bug 1701900 Comment 6 Edit History
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Sorry for my too long silence. I've tried the testcase I attached again. Curiously (for me), the required delay to get expected session data on environments are quite different: * Windows 10 21H1, Firefox 89.0: 80 msec * Windows 10 21H1, Nightly 91.0a1: 160 msec * Ubuntu 20.04 on VirtualBox, Firefox 88.0.1: 0 msec (no delay) * Ubuntu 20.04 on VirtualBox, Firefox 89.0: 1067 msec * Ubuntu 20.04 on VirtualBox, Nightly 91.0a1: 2133 msec I still cannot find out what triggers this difference, but it looks to be depending on its running environment.
Sorry for my too long silence. I've tried the testcase I attached again. Curiously (for me), the required delay to get expected session data on environments are quite different: * Windows 10 21H1, Firefox 88.0.1: 13 msec * Windows 10 21H1, Firefox 89.0: 80 msec * Windows 10 21H1, Nightly 91.0a1: 160 msec * Ubuntu 20.04 on VirtualBox, Firefox 88.0.1: 0 msec (no delay) * Ubuntu 20.04 on VirtualBox, Firefox 89.0: 1067 msec * Ubuntu 20.04 on VirtualBox, Nightly 91.0a1: 2133 msec I still cannot find out what triggers this difference, but it looks to be depending on its running environment.