We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

my office administrator has blocked browsing with firefox

more options

The following error was encountered:

   * Access Denied.
     Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect. 

FYI my office using proxy server for connecting to internet

The following error was encountered: * Access Denied. Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect. FYI my office using proxy server for connecting to internet

All Replies (2)

more options

Change your Firefox UserAgent to fool the server into thinking you're using IE.

https://addons.mozilla.org/en-US/firefox/addon/59/

http://en.wikipedia.org/wiki/User_Agent

more options

Thanks for give me solution, now i can using my firefox again after couple of month i'm using other browsers that i didnt like it :) thank you very much...