1856040 - unexpected behaviour of FF ESR on Windows with proxy configuration if a list of proxies is configured

Status: VERIFIED WORKSFORME

(Core :: Networking: Proxy, defect, P2)

Description

[Gerald]

Steps to reproduce:

in our environment no direct access to the internet from the company
network is allowed and all access have to go through internet proxies.

We configure with a proxy.pac file detailed rules which servers are
accessed directly and route the rest to proxies.

We have configured 2 sets of proxies to have some redundancy in case the
first entry is not working so that the browsers then can use the second one.

The respective config looks like that :

proxy = "PROXY x.x.x.x:8080; PROXY y.y.y.y:8080";

and in the rules section the internet traffic is directed to the
variable proxy

Actual results:

Firefox ESR, tested with version 102.15.1 and 115.2.1, always use the
second /last proxy entry and ignore the first one.

Expected results:

Firefox should behave as MS Edge and Google Chrome

• they use the first proxy in the list and if this times out they switch
  to the second one.

Comment 1

[Valentin Gosu [:valentin] (he/him)]

Hi Gerald,

Thank you for filing this bug.
Could you possibly capture some HTTP logs using these instructions? https://firefox-source-docs.mozilla.org/networking/http/logging.html
I recommend using a new profile to avoid including any personal information. You can send the logs to [e-mail]
Thanks!

Comment 2

[BMO Automation]

Moving bug to Core/Networking: Proxy.

Comment 3

[BMO Automation]

Moving bug to Core/Networking: Proxy

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

A needinfo is requested from the reporter, however, the reporter is inactive on Bugzilla. Given that the bug is still UNCONFIRMED, closing the bug as incomplete.

For more information, please visit BugBot documentation.

Comment 5

[Gerald]

I was not able to reproduce the issue after the next update to a version > 115.2.1

Comment 6

[Valentin Gosu [:valentin] (he/him)]

Thank you for checking.