After using Firefox for quite some time,I am now unable to connect to the internet using Firefox.I get a pop up message stating that Firefox is configured to use a proxy server that is refusing connections.How to fix this?

The message also states that I should check the proxy settings to make sure thaey are correct-I have no idea what this means,and says also to contact the network administer to make sure the proxy server is working.This is my home computer so I guess I am the administer.If it is any help I run system mechanic 10.5,but cannot find anything in system mechanic that I recognize as helpful.

Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

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