http://bugzilla.opensuse.org/show_bug.cgi?id=1198817 http://bugzilla.opensuse.org/show_bug.cgi?id=1198817#c1

--- Comment #1 from Johannes Krottmayer krjdev@gmail.com --- Firefox package version:

$ zypper info MozillaFirefox Loading repository data... Reading installed packages...

Information for package MozillaFirefox: --------------------------------------- Repository : Main Repository (OSS) Name : MozillaFirefox Version : 99.0.1-1.1 Arch : x86_64 Vendor : openSUSE Installed Size : 211.4 MiB Installed : Yes Status : up-to-date Source package : MozillaFirefox-99.0.1-1.1.src Upstream URL : http://www.mozilla.org/ Summary : Mozilla Firefox Web Browser Description : Mozilla Firefox is a standalone web browser, designed for standards compliance and performance. Its functionality can be enhanced via a plethora of extensions. $

Thunderbird package version:

$ zypper info MozillaThunderbird Loading repository data... Reading installed packages...

Information for package MozillaThunderbird: ------------------------------------------- Repository : Main Repository (OSS) Name : MozillaThunderbird Version : 91.8.1-1.1 Arch : x86_64 Vendor : openSUSE Installed Size : 211.1 MiB Installed : Yes Status : up-to-date Source package : MozillaThunderbird-91.8.1-1.1.src Upstream URL : https://www.thunderbird.net/ Summary : An integrated email, news feeds, chat, and newsgroups client Description : Thunderbird is a free, open-source, cross-platform application for managing email, news feeds, chat, and news groups. It is a local (rather than browser- or web-based) email application that is powerful yet easy to use. $

http://bugzilla.opensuse.org/show_bug.cgi?id=1198817 http://bugzilla.opensuse.org/show_bug.cgi?id=1198817#c3

--- Comment #3 from Johannes Krottmayer krjdev@gmail.com --- Sorry for my late response. Currently I renovate my apartment because of technical issues with my home network. Today I will receive a big package with CAT8 Ethernet equipment. :) Used too old cables for my network... But 40GBit with CAT8 should be enough for the next 10 years. ;)

I have narrowed down the issue:

Firefox and Thunderbird requires currently a IPv6 connection. If this the router from the ISP only supports IPv4, these Mozilla programs are very slow. (Very slow startup and handling.

I think I don't need to provide a list of the installed packages. There are no troubles with the packages.

http://bugzilla.opensuse.org/show_bug.cgi?id=1198817 http://bugzilla.opensuse.org/show_bug.cgi?id=1198817#c4

--- Comment #4 from Johannes Krottmayer krjdev@gmail.com --- I forgot:

My current (old) setup or my connection to the WWW:

ISP Router (VDSL 300MBit downstream) -> Linksys WRT32X (with OpenWrt) -> To the devices (PC, SMart TV, PS4 Pro).

When I disable IPv6 in my main router (LinkSys WRT33X) Firefox and Thunderbird are extremely slow.

Tried to disable IPv6 in about:config. But doesn't help.

http://bugzilla.opensuse.org/show_bug.cgi?id=1198817

Johannes Krottmayer krjdev@gmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Summary|Firefox 99 and Thunderbird |Firefox 99 and Thunderbird |91 unusable (extremly slow) |91 unusable (extremly slow) |since last update - |without a IPv6 network |Requires IPv6 |

http://bugzilla.opensuse.org/show_bug.cgi?id=1198817 http://bugzilla.opensuse.org/show_bug.cgi?id=1198817#c7

Dirk Weber d_werner@gmx.net changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |d_werner@gmx.net

--- Comment #7 from Dirk Weber d_werner@gmx.net --- (In reply to Johannes Krottmayer from comment #5)

My ISP only (A1 Telekom/Austria) currently only provide IPv6 for business customers as far I know.

Accidentally stumbled over this article some time ago - it seems IPv6 could be available also for A1 business customers: https://kofler.info/ipv6-eine-leidensgeschichte-aus-oesterreich/