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Firefox prefers IPv4 address in a dual-stack environment

Hi, I'm using IPv4 as well as IPv6 addresses in my home network. But Firefox uses always the IPv4 connection when I open a website. When I open the same website in MS Ed… (ďalšie informácie)

Hi,

I'm using IPv4 as well as IPv6 addresses in my home network. But Firefox uses always the IPv4 connection when I open a website. When I open the same website in MS Edge, the IPv6 connection is used.

I've captured the network traffic during opening a website in Firefox, which is reachable over IPv4 and IPv6. First I see two DNS queries (A and AAAA) for the domain name. Both responses containing the correct IP address, and they arrive nearly at the same time at the client. Next I can see the TCP handshake. But it's send between the IPv4 address only. No IPv6 connection was attempted.

When I run the IPv6 test at https://test-ipv6.com, the IPv6 resuls are nearly fine. Only the web browser test says "Your browser has real working IPv6 address - but is avoiding using it."

When I run the same test in MS Edge, all tests are fine.

So it seems that this is not a OS or network issue. It affects Firefox only.

What I've already tried:

  • Disabled all extensions
  • Created a new profile
  • Used the IPv6 address of the website instead of the FQDN -> Works fine.
  • Checked DNS cache of Firefox (about:networking). It contains the IPv4 and IPv6 addresses of the requested websites

I guess that Firefox prefers the A record for some reason. But I've no idea why. Has anybody an idea what could causing this?

Thanks.

Jas Man

Otázku položil(a) JasMan Pred 2 rokmi

Na otázku odpovedal(a) JasMan Pred 2 rokmi

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Update fault

After last update V104.0.2 fire fox will not allow me to access router to change settings message given, unable to connect, can I revert to previous version of firefox as… (ďalšie informácie)

After last update V104.0.2 fire fox will not allow me to access router to change settings message given, unable to connect, can I revert to previous version of firefox as always worked before update

Otázku položil(a) allan.pool Pred 2 rokmi

Na otázku odpovedal(a) cor-el Pred 2 rokmi

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Did Not Connect: Potential Security Issue (Error Code: MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT)

I can't connect to my router using this same link I've always used: https://router.asus.com:8443/ I also tried: http://router.asus.com and: http://192.168.1.1/ Nothing ha… (ďalšie informácie)

I can't connect to my router using this same link I've always used: https://router.asus.com:8443/ I also tried: http://router.asus.com and: http://192.168.1.1/ Nothing has changed! I get a security error. See attachment. There is no "Proceed at your own risk" option. I've spent hours searching for a work around or fix. Nothing works! How in blue blazes am I supposed to connect to my ASUS Router's GUI. This is Windows 10, Firefox 104.0.2 (64-bit)

Otázku položil(a) acct3 Pred 2 rokmi

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Private mode colors with CSS

Hello, I've changed the background color on the private tabs/windows with this CSS: @-moz-document url(about:privatebrowsing){ html.private{ background-color: #2B2A… (ďalšie informácie)

Hello,

I've changed the background color on the private tabs/windows with this CSS:

@-moz-document url(about:privatebrowsing){
 html.private{
  background-color: #2B2A33 !important;
  --in-content-page-color: gray !important;
}

I would like to make the "background-color" to be the same as the window background without hardcoding it, so it always match the theme, ie:

 background-color: <window.background> !important;

I would like to do the same with the background color of the search box in the private mode window, but I can't find the id.

Regards.

Otázku položil(a) jlwally Pred 1 rokom

Na otázku odpovedal(a) jlwally Pred 1 rokom

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Dotted frame on history/bookmarks view

Hello, I've just upgraded and almost done with the userchrome customizations but I need help with some little things. Is there a way to remove the dotted frame in the h… (ďalšie informácie)

Hello,

I've just upgraded and almost done with the userchrome customizations but I need help with some little things.

Is there a way to remove the dotted frame in the history/bookmarks tree as seen in the attached picture.

Thanks.

Otázku položil(a) jlwally Pred 1 rokom

Na otázku odpovedal(a) jlwally Pred 1 rokom