Firefox don't load the websites for a minute but other browsers does load them normally
I am facing a strange issue where the Browser doesn't load the website for a minute and shows server error. However, this behavior is not specific to any website and the server error shows randomly. Sometimes the browser loads the website normally while other times it shows server error. Please check this screencast: https://jmp.sh/jEu4D9k to understand better. So, I initially tried to open calendly.com and it didn't load despite my multiple reload attempts. However, when I tried to reload it after a minute then it came to life.
I have been facing this issue for many months and I tried almost every solution I found on Mozilla community pages like Resetting Mozilla, Setting No Proxy, Turning Off IPv6, DNS Prefetching Changes, Turning On/Off hardware acceleration, Uninstalled Mozilla and Installed a fresh copy, Changed to Mozilla Developer Edition, etc. but no luck. Please note that the other browsers are working fine and don't have any issues.
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There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.
https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can
https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites
https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message
https://support.mozilla.org/en-US/kb/connection-untrusted-error-message
Websites don't load - troubleshoot and fix error messages
http://kb.mozillazine.org/Error_loading_websites
Thanks for your answer... I appreciate that!
I have Avast Antivirus and the settings to check whether the connection is https or not is not selected. Also, I turned off the Web Shield completely but still the error persists. I just encountered the same error and I am adding the screenshot. One thing worth noticing is that alert icon in place of padlock Icon. Maybe it has something to do with the Security Certificate as you have pointed earlier but where. I checked the Firewall setting in BigSur but they are all fine. One thing to add... I had the same problem in the previous Windows 10 based system which I was using earlier. So the question is how the same issue passed to the new machine. Does this have something to do with my Mozilla Profile?
由Raj于修改
Start Firefox using Troubleshoot(Safe) Mode {web link}
A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?
Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?
http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia
If the problem goes away with the computer in Safe Mode,
the problem is with one of the other programs on the system.
As a test, disable your protection programs.