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Firefox Quantum on macOS High Sierra will not load any mozilla.org website, including subdomains.

  • 5 replies
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  • Last reply by 0culus_

0culus_
0culus_
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Today I installed Firefox Quantum on my Mac running High Sierra. It will not connect to any mozilla domain, including subdomains such as addons. Mozilla domains work fine on Chrome and Safari; I made sure proxy settings were sane (off).

I have tried completely removing all traces of Firefox and reinstalling to ensure any weird preferences are wiped out. This did not change the behavior.

I've attached a screenshot of the web console when trying to load addons.mozilla.org. Unfortunately, I cannot post from Firefox since it won't connect to support.mozilla.org either.

Today I installed Firefox Quantum on my Mac running High Sierra. It will not connect to any mozilla domain, including subdomains such as addons. Mozilla domains work fine on Chrome and Safari; I made sure proxy settings were sane (off). I have tried completely removing all traces of Firefox and reinstalling to ensure any weird preferences are wiped out. This did not change the behavior. I've attached a screenshot of the web console when trying to load addons.mozilla.org. Unfortunately, I cannot post from Firefox since it won't connect to support.mozilla.org either.

All Replies (5)

0culus_
0culus_ Question owner
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Here's the screenshot.

Shadow110
Shadow110
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Hi, if running any of these it could be them : Avast/AVG, Kaspersky, BitDefender and ESET

Can try this : Refresh but Note that this does more than uninstalling and re-installing does. Normal uninstalling does not remove some preferences which may have become corrupt. Please Refresh but do this 1st:

then

Or Dump Firefox and get a Full Version from here :

0culus_
0culus_ Question owner
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Pkshadow said

Hi, if running any of these it could be them : Avast/AVG, Kaspersky, BitDefender and ESET Can try this : Refresh but Note that this does more than uninstalling and re-installing does. Normal uninstalling does not remove some preferences which may have become corrupt. Please Refresh but do this 1st: then Or Dump Firefox and get a Full Version from here :

Hi,

Refreshing does not change anything. It still refuses to load mozilla.org. I do not have any endpoint protection running.

Shadow110
Shadow110
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So you used Safari to get to mozilla am wondering.... Please scan with this : https://www.malwarebytes.com/mac/ It is a typical issue with malware to block it's sites so will see.

0culus_
0culus_ Question owner
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Pkshadow said

So you used Safari to get to mozilla am wondering.... Please scan with this : https://www.malwarebytes.com/mac/ It is a typical issue with malware to block it's sites so will see.

That was my thought as well. Malwarebytes is showing clean, however. Not that that really proves anything, but there it is.