Firefox cannot access websites but ISP says I am connected to the internet
Firefox stops working several times a day & cannot access websites. PC is connected via Ethernet to the modem/router. I get a message website cannot be found. I called the ISP a couple times & they show me connected to the internet.
Firefox will not completely close & let me run it again. Task Manager lets me remove all but one occurrence of FF, which prevents me from running another copy of it.
I end up restarting the PC several times a day to get connected again.
The last time I was looking in Control Panel > Network Connections & that window froze & could not close out of it. I could open FF over the Control Panel window but could not run FF. I let it sit while using a wireless device to look up stuff. The monitor went to sleep because there was no signal, probably because the PC went to sleep. I could not wake up the PC & had to power it off.
Another time Network Connections > Local Area Connections was stuck on "identifying..." and never found the router.
All this started happening after I tried a USB wireless adapter & installed its driver & Cisco software that got installed with the driver. I have uninstalled all this & updated the wired network adapter driver.
I tried to restore Windows back to an earlier date a couple times but a message said the restore was not successful.
Any suggestions would be appreciated, Thanks
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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?
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
Firefox works perfectly when accessing any website I’ve used. Until it doesn’t.
I just updated to vers 89.0.2 but it acted the same on whatever the previous version was.
I have a couple FF profiles & one does not have any add-ons but it makes no difference.
I can use the PC for hours without a problem & close FF when done. The problem seems to occur when I come back to the PC whether it’s an hour later or 6 hours later. I’m not sure if it always has a problem when I come back to the PC because I never thought about that aspect until now.
As I think back it seems FF does not work when the PC wakes up from sleep mode. I can open FF but it will not access any website. Maybe something in the network controller or similar is not waking up when the PC wakes up?
Last night I changed the Power Options so the PC would never go to sleep. Every few hours I’d check & Firefox always worked. I realize that’s a short term test but is there something I can check that controls waking up a network connection?
Could that USB wireless adapter I tried have disabled some wired network setting?
You might ask about that here: https://support.microsoft.com
http://answers.microsoft.com/en-US/windows/forum/windows_10
Windows 7 is no longer supported. But someone might help.