This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox 70.0.1 HOSTS file being ignored

  • 4 replies
  • 1 has this problem
  • 6 views
  • Last reply by markx2

markx2
markx2
more options

Mac OS Catalina 10.15.1 In Preferences, DNS over HTTPS is Off. (I tried toggling that On then Off but nothing changed) In Privacy & Security I have Strict settings, though when Standard is selected the behaviour does not change.

I know that with DNS over HTTPS set to On that HOSTS is ignored. Not ideal but there you go. But with that Off Firefox did respect the HOSTS entries I have.

Something has changed?

How do I get Firefox to always use my HOSTS file before looking elsewhere?

Thank you

Mac OS Catalina 10.15.1 In Preferences, DNS over HTTPS is Off. (I tried toggling that On then Off but nothing changed) In Privacy & Security I have Strict settings, though when Standard is selected the behaviour does not change. I know that with DNS over HTTPS set to On that HOSTS is ignored. Not ideal but there you go. But with that Off Firefox did respect the HOSTS entries I have. Something has changed? How do I get Firefox to always use my HOSTS file before looking elsewhere? Thank you

All Replies (4)

Dinushi Dhananjani
Dinushi Dhananjani
more options

I just show someone got same problem and he got solution, 

https://support.mozilla.org/en-US/questions/1271614
markx2
markx2 Question owner
more options

Thanks - I saw that when I searched but I cannot see the actual solution?

I just see "Okay, problem solved! "

Where is their solution?

Thanks

crankygoat
crankygoat
more options

There isn't a solution posted, the person seems to have figured it out themself and did not share.

Turning the feature off probably will not stop the issue immediately by itself. You may need to clear the browser cache, and also flush the local DNS cache. Apparently the terminal commands vary by version of OS X. https://duckduckgo.com/?q=flush+dns+cache+mac+os+x&t=lm&ia=web

markx2
markx2 Question owner
more options

Thanks.

Catalina sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

Restart Firefox and it will still load twitter, facebook and instagram which are all comprehensively routed to 0.0.0.0. in my HOSTS file.

I have the same HOSTS file on my PC (Win 10) and use Firefox there. It does respect the HOSTS file.

So this is a mac only issue.

I'm going to have to use pi-hole.

Thanks anyway.