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

http://[2606:4700:4700::1111] crash firefox

  • 6 replies
  • 1 has this problem
  • Last reply by Anime4000

more options

I tried open IPv6 website http://[2606:4700:4700::1111] and it crash firefox even in safe mode. I guess IPv6 HTTP to HTTPS redirect cause firefox to crash.

Firefox version: 63

All Replies (6)

more options

I can see this happening as well; can you please create a bug report about it here: ?

more options

Hi Anime4000 and user1929

That URL doesn't crash my Firefox 63.0 (Windows 10, Surface Book, no Firefox-addons, no 3rd party Anti-virus or firewall software just Windows Defender)

1. Please let us know the crashid:

2. and copy and paste your troubleshooting information here (you can find this at the following url: about:support )

3. what you did, what you expected (this ipV6 url seems to be of a DNS resolver, why were you checking it out?), what actually happened (besides crashing, any error messages or other details would be helpful

You can also file a bug if you are technically minded.



more options

This is the crash report I get:

And another one from 65 nightly:

I can't think of anything unusual about the environment I'm running Firefox in (macOS 10.13, no antivirus/firewall/etc, but maybe I'm missing something). I'm not entirely sure what this URL is either; hopefully Anime4000 will respond and tell us what it is.

Link to about:support data (I can't post it here because it exceeds the character limit):

more options

I attach 2 picture of my IPv6 Configuration, I using ISP Native IPv6.


Latest Crash reporter that I just submitted:

I using CloudFlare DNS: IPv4 > IPv6 > 2606:4700:4700::1111

these address are accessible via web browser

more options

Hi again Anime4000, some tests i've tried:

1. surface book 2, windows 10, ff63.0 opens the website https://[2606:4700:4700::1111]/ at the mozilla office, at home the site doesn't load perhaps due to my home wifi and ip config not being ipv6 compatible and it doesn't crash

2. 5 year old pc at mozilla office, windows 10, ff65 nightly opens the website which is cloudflare's website about DNS https://[2606:4700:4700::1111]/ and it doesn't crash

3. mac book pro 13", ff63.0 does not open https://[2606:4700:4700::1111]/ at the mozilla office or at home and it doesn't crash "unable to connect, Firefox can't establish a connect to the server at [2606:4700:4700::1111], update i changed ipv6 settings to "automatic" from "link local" and the website renders

4. my colleague's mac book pro 13" touchbar 16gb RAM , ff64.0 latest beta i.e. beta 4, mac os 10.14 mojave it crashes

Based on the above I would say go and and file a bug please!



more options

Roland Tanglao said


try open with HTTP first, then let firefox accept server request HTTP to HTTPS redirection.

http://[2606:4700:4700::1111] http://[2606:4700:4700::1001]

already open a bug case:

Modified by Anime4000