I can't go to a single website in Firefox

[VirtualLarry]

Turn off DNS-over-HTTPS, so that your DNS gets looked up locally on your server / router. DNS-over-HTTPS bypasses all of that.

 

[Red Squirrel]

It's disabled already, I don't recall if I disabled it because it was causing issues or if it was just always off. Keep in mind this happens randomly too, and it's very sporadic as to which site it will access. Last time it was a couple sites, now it's only an internal site.

 

[VirtualLarry]

If that's disabled, then it's your internal DNS that's having issues, or your IP routing/VLANs.

 

[Red Squirrel]

Why would it only do it in Firefox though? If I do nslookup in a console or ping the site I get the right IP. Or if I use a different Firefox profile it works also. That, and it's random. Ex: if I wait a few hours it will start to work again.

 

[Red Squirrel]

Also forgot to add, rebooting seems to fix the issue as well. But it eventually comes back, and it's not always the same site.

 

[mxnerd]

Any extension installed? And what's the reason not deleting the profile that's causing problem? Or uninstall then reinstall Firefox?

 

[Red Squirrel]

If this is some kind of bug I imagine it's bound to happen on any profile it's just that using a new one does rule out that when the bug hits, it only affects the active profile. Suppose I could try to redo my profile to see if it fixes the issue permanently, it only happens like once or twice a month so it will be a while before I know. I only have a couple extensions. Privacy Badger, ublock, Facebook container, h264ify (fixes some performance issues I was having with some Youtube videos in Linux) and duckduckgo privacy essentials.

 

[mxnerd]

That's quite a few privacy extensions. I just found one add-on

Always Open Privately â Get this Extension for ð¦ Firefox (en-US)

Download Always Open Privately for Firefox. Always opens certain websites (configurable list of websites) in a private window. Needs the permission to run in private windows.

addons.mozilla.org

See if it can help.

Put your local website in the always-open-privately list so that most extensions won't load when you try to open your local website.

Of course you need to allow always-open-privately extension to run in Private Window.