While the best option in terms of security and anonymity is considered chain: VPN + Proxy. The best option to solve this problem is using a special program Proxifier. Or need to use a browser that supports proxy configuration directly in the browser. More about configuring proxy in Firefox in Mac OS. By default, Firefox is set to “Use system proxy settings”. No proxy: Firefox won’t use a proxy server, even if one is configured in your system-wide proxy settings. Auto-detect proxy settings for this network: Firefox will use the Web Proxy Auto-Discovery Protocol, also known as WPAD, to detect the appropriate proxy for your network.
If the above error messege displays when your internet service provider, router, modem, and WiFi are okay. Probably this problem caused by a wrong network setting in Firefox web browser. You have never changed the Firefox network setting ? This could be done by an adware, malware or any other harmful programs that you have on your computer. So please, don’t forget to do virus scan on your computer. Here is the solution for the proxy server error.
Open Menu > Options > Advanced > Network Connection > Settings > Change the proxy server setting
1. Screensavers for mac. Open Firefox web browser, and if you see the top-right side of your web browser, you will see “Open Menu” with 3 horizontal lines. Click it, then click “Options”.
2. You will see many different settings. Please click “Advanced” then under Advanced, click “Network”.
3. Now, click “Settings” in connection box. You will now see proxy settings. Check “No proxy”. Click OK.
Hope your proxy server is refusing connections problem get it fixed with this ! 😀 😀 😀
Your organization or Internet service provider may offer or require you to use a proxy. A proxy acts as an intermediary between your computer and the Internet. It intercepts all requests to the Internet to see if it can fulfill the request using its cache. Proxies are used to improve performance, filter requests, and hide your computer from the Internet to improve security. Proxies are often part of corporate firewalls.
Connection settings to use a proxy can be set in Firefox OptionsPreferences as follows: