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

Avast premium won't let me open webpages on Mozzila Firefox

  • 1 resposta
  • 1 has this problem
  • 6 views
  • Last reply by FredMcD

more options

Hi community,

a week ago i installed avast premium security, from that day firefox does not open any webpage, stuck in loading of the web page and after 1 minute stops the effort to reach the webpage.

When disabling avast shields, firefox works again and i can access webpages.

Other internet browsers works fine.

Before installing avast premium i had the free antivirus as protection and mozzila firefox was working just fine.

I run windows 10.

Thank you.

Hi community, a week ago i installed avast premium security, from that day firefox does not open any webpage, stuck in loading of the web page and after 1 minute stops the effort to reach the webpage. When disabling avast shields, firefox works again and i can access webpages. Other internet browsers works fine. Before installing avast premium i had the free antivirus as protection and mozzila firefox was working just fine. I run windows 10. Thank you.

All Replies (1)

more options

You should contact Avast support.

It sounds like Avast installed a firewall, and does not let Firefox thru.


Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}