Here's the article explaining that the hosts file is being ignored, which many have seen as a bug: DoH, when enabled, ensures that your ISP cannot collect information related to your browsing behavior. The process hides domain name lookups from someone lurking on public WiFi, your ISP, or anyone else on your local network. This is done to prevent third parties from seeing what websites you are trying to access. As of 2019, Firefox sends the domain name you typed to a DoH-compatible DNS server using an encrypted HTTPS connection instead of a plain text one. In long, it certainly does look as though Firefox's intent was to define its own paths, before the OS looks at the hosts file. Possibly, firefox will forward the request to some external server (not the default server, that is, the router) even before the operating system checks the hosts file. What is implied by the previous posts is that firefox will bypass the configured dns server (that is, my router) and go straight to a nameserver of its own choice. I wasn't too thrilled that Firefox defaulted to changing the DNS machine I knew I was using from my ISP to one I neither authorized anyone changing mine to, or knew enough about to have it doing all my internet name lookups, even if it is encrypted where my ISP's is sent plain text. The local resolve would instruct the calling party to goto dev:null and the second lookup would never happen. IOW, I have blacklisted, and when a site links to them, first it will try to resolve locally, and if that fails it then tries to resolve the name "" into an ip address with a DNS lookup. I'm pretty sure that entries in a HOSTS file will dead end any matching requests before they get a chance to be sent to a DNS machine. When it's not over HTTPS it's not encrypted and can be read by your ISP (or whoever is doing the DNS). The "Enable DNS over HTTPS" only changes how communication to the DNS happens. Isn't the hosts file part of Windows' network layer? Unless the browsers have a separate dns resolver, I'd think they'd have to use the operating system's. There's also a common issue of the hosts file being ignored by all browsers, but that doesn't sound like what you're experiencing. You can force it to by UNchecking the box beside "Enable DNS over HTTPS" within Firefox's settings, but it's not quite as safe. If you're using Firefox, be aware that Firefox no longer uses the hosts file. (You can't save it without an extension from Notepad directly.)Īfterwards, copy and paste it to Windows\System32\drivers\etc folder and overwrite the existing hosts file. After saving it that way, access the saved new copy of the hosts file from Explorer, set File explorer > View > check "File name extensions",and delete the ".txt" extension from your new copy of the hosts file. The easiest way to make modifications to it is to open it, make the changes, and then save it to a non-system folder, like Documents. In Win 10, the hosts file is difficult to directly edit - that may be what you're experiencing, as you won't get any warning that your changes are not being saved.
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