Fox Web Security


Unfortunately, WebExtensions (the new API for Firefox 57+) does not have the functionality for the correct operation of this addon in Firefox.
So this addon will no longer work with the release of Firefox 57 in November 2017!
This is the inevitable change in Firefox - all Xul-addons will die out in Firefox 57

But you can install Firefox 52 ESR and enjoy work until June 2018

Fox Web Security is designed to protect you and your children against the dangers of the Internet!

This add-on automatically blocks known dangerous websites.
It also can block unwanted content that is not suitable for children.

In contrast to the existing add-ons - Fox Web Security is very small and run like the wind.
But a high speed and small size do not mean that it will perform a bad job!

Thanks to professionals in the anti-virus domain and the innovative algorithms of this add-on, Fox Web Security provides high-level protection.

This add-on provides protection from web threats and restricts access to adult content on the basis of information from well-known, safe and free DNS servers:

To protect you against the dangers that lie on the Internet, Fox Web Security does not transmit or store any personal data -- all the protection is built on a danger level definition based on the domain name.
Therefore, there are limitations:

Fox Web Security does not guarantee the accuracy of the blocked websites list when using the service (in particular, it does not guarantee that websites that aren't blocked don't contain, distribute, or redirect to malicious code or software, or is prevented from displaying scam/erotic/pornographic content, and vice versa).

Fox Web Security can't be held liable for any damage, direct or indirect, caused to the user or any third party from the use or inability to use the service, including but not limited to damages caused by the inaccuracy of the blocked websites list when using the service.

Fox Web Security expresses its gratitude to the owners of the aforementioned DNS servers, that provide security for users!


The following little keywords are at the request of those who can't remember the name "Fox Web Security" and want searches to work. It takes adult control, parental control, web filter.

For classic pop-up alerts please use this addon:

Fox Web Security for Google Chrome:

forums mozillaZine:

Download files:


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