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Your beta version with DNS masking turned on freezes repeatedly and I can only close FireFox by force quitting using Task Manager. Why is this?

  • 8 replies
  • 1 has this problem
  • Last reply by jscher2000

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Cannot switch tabs or close windows frequently when DNS masking is on. The DNS address I use is (Cloudflare). I haven't tried (Google) yet. Anyway, I am concerned about internet security and want to use more secure DNS addresses as well as VPN. I wish FireFox would offer free VPN like Opera does.

All Replies (8)

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Hmm, I have not heard of DNS masking. Is that a beta feature?

Speaking of new features, check out:

As for VPN, for the foreseeable future, you'll need either an add-on or a system-level VPN.

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Yes, it's the beta version. Supposedly using new domain server names from Cloudflare ( or Google ( helps to prevent government surveillance. It's an extra level of security besides using VPN.

After the EquiFax and Facebook security leaks, people are concerned about their personal data.

I appreciate your help.

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Hi, this is completely new to us in Support as the announcement by Cloudflare was only made yesterday. It is a holiday still and have only seen 1 small article today : that was not informative or as long as the Cnet article I was asked about yesterday covering the release info : All I do know is that there is a web site : you may find info there.

Please let us know if this solved your issue or if need further assistance.

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I don't understand why DNS settings would affect your ability to switch tabs. Perhaps it's a coincidence and there is a completely unrelated issue affecting the UI?

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It only happens with beta FireFox not with Opera, Chrome or Edge. None of which has the manual DNS feature.

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Manual DNS, hmm. What setting did you change? Is there an article which discusses this setting?

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I appreciate your help and curiosity but this info is easily found through an internet search.

If FireFox successfully implemented this tool and offered a VPN connection it would blow Edge and Chrome out of the water. Opera is already ahead of all of you.

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Okay, I've seen these articles, but I'm most interested in what setting you changed on your Firefox, or if you didn't change a setting on Firefox but only at the system level.

I experimented with DNS over HTTPS in Nightly this morning and it didn't involve using an IP address (

But that might not be applicable to beta.