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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

I get this message after loading Firefox for the first time (Access denied to system because of URL Filter Configuration) I am currently running IE

AnonymousUser
AnonymousUser
more options

I have just loaded Firefox for the first time and receive this as the heading of a message box Access denied to system because of URL Filter Configuration"".

This happened

Every time Firefox opened

I loaded Firefox for the first time

User Agent

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; GTB6.4; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 3.0.30729; OfficeLiveConnector.1.4; OfficeLivePatch.1.3)

I have just loaded Firefox for the first time and receive this as the heading of a message box Access denied to system because of URL Filter Configuration"". == This happened == Every time Firefox opened == I loaded Firefox for the first time == == User Agent == Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; GTB6.4; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 3.0.30729; OfficeLiveConnector.1.4; OfficeLivePatch.1.3)

All Replies (2)

AnonymousUser
AnonymousUser Question owner
more options

Yea How do we fix this problem?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

See "Connection settings": Firefox can't load websites but other browsers can

You can find the connection setting here: Tools > Options > Advanced : Network : Connection If you do not need to use a proxy to connect to internet then select No Proxy