Clear Cookies & Cache

https://support.mozilla.com/en-US/kb/Template:clearCookiesCache

Clear the Network Cache

https://support.mozilla.com/en-US/kb/How%20to%20clear%20the%20cache#w_clear-the-cache

You can also try to reload the web page(s) and bypass the cache.

• Press and hold Shift and left-click the Reload button.
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Cmd + Shift + R" (MAC)

If it doesn't help, try this:

Firefox Hangs

https://support.mozilla.com/en-US/kb/Firefox%20hangs

Check and tell if its working.

Hello

Thanks for your response. I just friend all of those things and nothing works. Firefox loads but then is completely unresponsive when trying to start browsing.

Any other ideas?

Thanks :)

See the Last Paragraph with Bulleted points in this article - Hang at Exit

https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_hang-at-exit

Firefox is already running but is not responding

https://support.mozilla.com/en-US/kb/Firefox%20is%20already%20running%20but%20is%20not%20responding

Check and tell if its working.

Thanks.

Yes tried all that. No luck. This is a new install of Firefox on a brand new system, so there is no cache to clear (though I did it anyway) and no add-ons at all to do anything with.

And Firefox doesn't tell me it isn't responding. It just does nothing!

Basic Troubleshooting

https://support.mozilla.com/en-US/kb/Basic%20Troubleshooting

Is my Firefox problem a result of Malware ?

https://support.mozilla.com/en-US/kb/Is%20my%20Firefox%20problem%20a%20result%20of%20malware

Check and tell if its working.

Ive gone through all of this stuff carefully......still not working :(

Thanks so much for trying to help...any more ideas?

-> click Firefox button and click Exit

-> Start Firefox in Safe Mode (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

https://support.mozilla.com/kb/Safe+Mode

Firefox Safe Mode window will open. DON'T SELECT ANY OPTIONS, just click Continue in Safe Mode

Check and tell if its working while you are Browsing in Firefox Safe Mode.

Ok just tried in safe mode. Exactly the same result. Absolutely nothing happens.

In case it helps.....when I first start Firefox and attempt to search or go straight to a web page, it says 'connecting' for about half a second on the tab at the top of the page. Then it goes dead. After that first attempt, every time I try to search it is completely dead and I don't even get 'connecting'

Cheers

Are your other Web Browsers able to connect to the internet ??

Hey I got to the bottom of the problem......it was little snitch! I thought I had it configured properly but obviously not.

Thanks so much for trying so hard to help!

)

What was that little snitch ?? Please explain so other users having the same problem will also be able to Configure that little snitch :-P

Sorry....

Little Snitch is a firewall: http://www.obdev.at/products/littlesnitch/index.html

You basically configure it to allow/disallow certain applications to access the internet. If Firefox is not on the restricted list, don't assume it will automatically be allowed to connect.

You must ensure to add Firefox to the list of allowed applications.

Hope that helps :)