Method 3: Switching to an HTTPS Proxy is the third option (if applicable)

If the problem persists after following the instructions below, or if this technique isn’t applicable, continue to the next possible solution.

After the next computer setup is complete, check to see if the problem has been resolved.

Save the configuration and restart your computer after that.

After you’ve identified the problematic port, go to your proxy setup settings and look for an option to add the port as an alternate SSL port.Examine the URL causing the ‘The Proxy server is refusing connections’ issue to check if it has any evidence of an active port.Method 2: Adding the SSL port of the URL to the list of authorized ports (if applicable) If the ‘The Proxy server is denying connections’ error persists, proceed to the next possible solution below.When you’ve finished making this change, click Ok to save it, then restart your browser and try to view the same web page that was previously failing.Change the toggle associated with Configure Access to the Internet to ‘Use system proxy settings’ after you’ve managed to show the Connection Settings menu.

When you arrive, select Settings to access the advanced menu. Select the General category from the vertical menu on the left once inside the Options tab, then utilize the right-hand side menu to scroll down to Network Settings.Select Options from the newly appearing context menu. Open your Mozilla Firefox browser and go to the top-right corner of the screen to the action button.Method 1: Make Firefox detect proxy settings automatically This issue can also occur if your computer is infected with malware, altering some internal settings. This problem usually happens when you use a VPN service or have an incorrect or dead proxy configuration. Even though we’ve shown you how to troubleshoot Firefox, you’ll need to do the same with Chrome. If you’re using the Mozilla Firefox or Google Chrome browsers on Windows and get an error message saying “The proxy server is denying connections” when trying to view a website, this post can assist. Here we can see “What to Do If Your Proxy Server Is Refusing Connections An error has occurred in Firefox”

Use system proxy settings firefox