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@LeChatQuiLit It is in the Network settings part of the preferences; note that it is a testing feature, not intended for persistent use; too many sites say "Not looking like Chrome. Go away!" when seeing "Vivaldi"

@LeChatQuiLit Good to hear; no idea what changed, unless something happened due to our reports of other problems.

@LeChatQuiLit We need examples. The RayID shown at the bottom of CloudFlare's dialog can be useful to provide to.

Please check if any of what is mentioned in https://forum.vivaldi.net/topic/117404/cloudflare-verification-and-vivaldi-april-2026 apply to your install, and if so, please provide information.

If you could run a test at https://browser-compat.turnstile.workers.dev/ and if your test fails, please file a bug and attach the full output that you can access in the dialog.

Note that I just did a test with my Linux installations (snap and deb), and both passed.

A few weeks ago we did notice a problem with Linux/Mac; and notified Cloudflare about; presently not aware of status of that Cloudflare side.