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Using Edge 131 on Ubuntu there is no "Security" section in the settings and no "Manage certificates" setting that used to be there.
How can I setup self-signed certificates and private user certificates?
Developing and testing features or extensions for Microsoft Edge
Unfortunately, the Security settings currently have some rendering issues, which will get fixed in next versions.
Before that, you can still navigate to edge://settings/privacy/manageCertificates and access the Manage certificates settings.
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Best Regards,
Shijie Li
Current edge scheme URI, with Edge 153 in year 2026 on Ubuntu, no idea since when, is
edge://certificate-manager/clientcerts
and that works.