Hi, what extensions are you running as no information was shared ? What Security Software are you running ? What error messages are you getting please ?

Hi

Windows 10 Windows defender No extensions No error message

Have slso uninstalled and reinstalled Firefox

Regards

Eric

Please try this for the little it turns off on you : SAFE MODE

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

In Firefox Safe mode these changes are effective:

• all extensions are disabled (about:addons)
• default theme is used (no persona)
• userChrome.css and userContent.css are ignored (chrome folder)
• default toolbar layout is used (file: localstore-safe.rdf)
• Javascript JIT compilers are disabled (prefs: javascript.options.*jit)
• hardware acceleration is disabled (Options > Advanced > General)
• plugins are not affected
• preferences are not affected

TEST''''is issue still there ?

Hi again

Also have Avast

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

• Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
• Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

• https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can
• http://kb.mozillazine.org/Error_loading_websites

That was what I was looking for : There is security software like Avast/AVG, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate.

• https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message#w_avast-and-avg-security-products

Hi once more,

My pc was telling me that I had a problem with Hola. So I reinstalled Hola but I subsequently uninstalled it.

Eric

HI, it is something in Avast that is blocking Firefox. It was fixed on the 28th but seems it is back again.

But yes Hola may cause issues. But start where we know there is and has been issues many times before.

Hi, I tried the changes to Avast, but that did not work I have now uninstalled Avast, refreshed Firefox, without success

Firefox is still not working.

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites like Mozilla. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

Hi, I have tried 3 time to start pc in Safe Mode with network (option 5). Each time I do this the pc starts in safe mode but with no Internet connection. I am still unable to load any Web sites from Firefox

Eric

Are you using WiFi? Its drivers may not be loading in safe mode. Can you use a cable to your modem?

As a test, disable your protection programs.

Hi, I don't have access to router as am away on homiday. Will try your suggestion when I get home.

Thanks

Eric

Hi, I have connected by cable to router, started in safe mode with internet. Still unable to load any web site

Not sure if this bit of info is any use. I downloaded another browser, Opera. But when I went to install it I got a message telling me that I had to be connected to the Internet. However, I was connected to the Internet. The same happened when I dowloaded Utorrent. Again I got a message tli g that I had to be connected to the Internet, which I was. I amusing Edge. Also, when I try to use Chrome, I get a message telling me I need Internet connection.

Would you take a look at this article please :

https://ccm.net/forum/affich-864669-internet-connected-but-browsers-not-working-windows-10

Note : There are different solutions mentioned in that thread ......

Also see :

http://www.tomsguide.com/answers/id-3414484/browse-internet-connected-wifi-data-connection.html