This is still happening using the latest version of Firefox Nightly, regardless of the status of ETP.
Bug 1624914 Comment 26 Edit History
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This is still happening using the latest version of Firefox Nightly, regardless of the status of ETP. Tested with: Browser / Version:Firefox Nightly 87.0a1 (2021-02-17) (64-bit) Operating System: Windows 10 PRO x64