1737559 - "Use system proxy settings" not working as expected in Firefox 93

Status: RESOLVED DUPLICATE of bug 621429

(Core :: Networking, defect)

Description

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User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36

Steps to reproduce:

Firefox 93 (64-bit) on Windows Server 2012 R2

Scenario A

1. Configure proxy settings under Network Settings to "Use system proxy settings"
2. IE/system proxy settings are configured to "Automatically detect settings"
3. Network has WPAD enabled

Scenario B

1. Configure Network Settings in Firefox to "Auto-detect proxy settings for this network"

Actual results:

Scenario A

1. Can access the internet using IE/Edge/Chrome
2. No internet access in Firefox

Scenario B

1. Internet access works correctly in Firefox
2. WPAD appears to be working correctly

Expected results:

Scenario A

1. Firefox should have read the system proxy settings correctly and used WPAD to detect proxy settings

Scenario B

1. Results are as expected

Comment 1

[Marcela (Please NI request to Brindusa Tot)]

Hi!
I'll set a component to have a starting point for this. Please feel free to change it if you consider one more appropriate.
Thanks!