Hello, I work for Orange, a French company, which has a IT infrastructure of ~100K computers.
We’ve just deployed Firefox ESR 60 on ~8000 computers (the other computers are still in version ESR 52), and we have implemented the GPO. We have a negative feedback from some users who encounter disconnections while browsing the internet. At first they can browse normally, but after a while, the users see the following error : “Hmm. We’re having trouble finding that site” with the little character in blue on the left with his map. And they need to close and relaunch Firefox. We’ve found a website where it’s easy to reproduce the issue (www.lequipe.fr<http://www.lequipe.fr>, a French sports news website), it may obviously occur on other sites but we’ve performed our tests on this one. If we just open this website and let it open without doing anything for some while, the error message appears. For the internet and intranet connection, we use a proxy .pac file (somewhat complex, with ~300 lines). After performing some cross-testing, we’ve found the following: - if we set Firefox to use the proxy system settings like we did at first, we encounter the issue (on Internet Explorer there is the same proxy .pac address) - if we set Firefox to use the automatic proxy configuration address and put the proxy .pac address in the field, we encounter the issue as well - but if we set Firefox to use the manual configuration, and here we set a proxy server address with port 8080, then it works, the issue does not appear - (we tried other things like disabling IPV6, disabling DNS Prefetch, repairing the profiles, with or without the GPO, the policies.json file, etc. but all of these wasn’t relevant, the issue continued to appear after each of these tests) Unfortunately, on a large scale, we cannot implement this third solution, we must find a way to make it work with our proxy .pac address. On previous versions of Firefox like Firefox ESR 52 or lower: no issue On Internet Explorer 11: no issue as well Could you help us please ? Thank you very much Cordialement / Best regards, [http://www.orange.com/sirius/logos_mail/orange_logo.gif]<http://www.orange.com/> Marius TARLO Maintenance e-buro FT/SCE/G2S/NRS/NEOCLES tél. +33 1 42 75 34 25 [email protected]<mailto:[email protected]> _________________________________________________________________________________________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged information that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and delete this message and its attachments. As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. Thank you.
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