Fix problems connecting to websites after updating Firefox

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  • Revision id: 14089
  • Created:
  • Creator: AliceWyman
  • Comment: added summary, fixed link to Avira KB article
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
  • Readied for localization:
  • Readied for localization by: AliceWyman
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This article describes how to troubleshoot problems connecting to websites that start immediately after updating Firefox to a new version.


The cause

If you were able to load websites until you updated Firefox, your Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more) is likely preventing Firefox from connecting to the Internet.

This problem occurs when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted.

Some Internet security programs can block Internet access even when they are in a "disabled" state.

Fixing the problem

To allow Firefox to connect to the Internet again:

  1. Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  2. Remove Firefox from your program's list of trusted or recognized programs, then add it back.

If the Internet security program or firewall you are using is listed below, click its link to see a tutorial on how to configure it to allow Firefox to connect to the Internet again: