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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I work for Orange, a French company, which has a IT infrastructure of ~100K computers.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">We have a negative feedback from some users who encounter disconnections while browsing the internet.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">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.<br>
And they need to close and relaunch Firefox.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">We’ve found a website where it’s easy to reproduce the issue (<a href="http://www.lequipe.fr">www.lequipe.fr</a>, a French sports news website), it may obviously
occur on other sites but we’ve performed our tests on this one. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">If we just open this website and let it open without doing anything for some while, the error message appears.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">For the internet and intranet connection, we use a proxy .pac file (somewhat complex, with ~300 lines).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">After performing some cross-testing, we’ve found the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">- 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)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">- 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<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">- 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<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">- (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)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">On previous versions of Firefox like Firefox ESR 52 or lower: no issue<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">On Internet Explorer 11: no issue as well<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Could you help us please ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thank you very much<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:FR">Cordialement / Best regards,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:10.0pt;margin-right:0cm;margin-bottom:10.0pt;margin-left:0cm">
<a href="http://www.orange.com/"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:blue;mso-fareast-language:FR;text-decoration:none"><img border="0" width="40" height="40" id="Picture_x0020_1" src="cid:image001.gif@01D48E39.852A50D0" alt="http://www.orange.com/sirius/logos_mail/orange_logo.gif"></span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black;mso-fareast-language:FR">Marius TARLO</span></b><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black;mso-fareast-language:FR"><br>
Maintenance e-buro<br>
FT/SCE/G2S/NRS/NEOCLES<br>
tél. +33 1 42 75 34 25<br>
</span><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#E36C0A;mso-fareast-language:FR"><a href="mailto:marius.tarlo@orange.com"><span style="color:#E36C0A">marius.tarlo@orange.com</span></a></span><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#F79646;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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