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Firefox is setting a DNS override in all machines to 127.0.0.1 I can't find a way to stop this. It is over riding DNS software I want to use. This seems new.

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Firefox is setting a fixed DNS override in all machines to 127.0.0.1 I can't find a way to stop this. It is over riding DNS software I want to use.

One AV program recognizes this (probably incorrectly) as a DNS:highjack and it I remove it it resets Firefox to a blank slate and I start over w/ re-syncing and reloading favorites etc and the DNS setting is put back in place.

I want my DNS settings to stay at automatic.

Firefox is setting a fixed DNS override in all machines to 127.0.0.1 I can't find a way to stop this. It is over riding DNS software I want to use. One AV program recognizes this (probably incorrectly) as a DNS:highjack and it I remove it it resets Firefox to a blank slate and I start over w/ re-syncing and reloading favorites etc and the DNS setting is put back in place. I want my DNS settings to stay at automatic.
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Hi newportironman, I think this might have something to do with the DoH Rollout. There was supposed to be a notice when this was activated but, I didn't get one - probably because I use DoH anyway.

So, you will need to go to: Menu -> Options -> General page scroll all the way down to Network Settings select Settings scroll down to the bottom of the settings window and de-select *Enable DNS over HTTPS

If it turns back on, there is a way to force it to stay off in the Advanced Preferences (about:config).

See this article: DNS-over-HTTPS (DoH) FAQs