Last week I could navigate to edge://flags/#allow-insecure-localhost and I could edit the flag so that my localhost could serve invalid SSL certificates. Today after the latest Edge update (Version 88.0.705.50) I can no longer find this flag.
Has it moved to another secret area? How can I allow insecure localhost SSL certs again for my application?
As of Edge v134, this flag is no longer available as M130 flags are now permanently expired and the #allow-insecure-localhost is set to expire in M130 as of this writing.
Until Chromium re-enables the flag, Edge users will have to downgrade to v133 or below to trust localhost.
To workaround this issue on version 119-133:
edge://flagsTemporarily unexpire M130 flags (or any lower version number there ) and enable it#allow-insecure-localhost again. It should appear now.Enable it and enjoy happy developer's life.
update 2025-05 : it may not work with edge version >= 135 anymore. We can try this answer below instead