Firefox extension to always use smart referer
JavaScript HTML Makefile CSS

Smart Referer

This extension automatically hides the referer when changing domains.

The domain changing is based on the same origin policy.


  • Strict mode: When enabled, Smart Referer will treat different subdomains as being different websites. Therefor and will not be able to see each others referer. In general this often causes issues and results in little to no privacy improvement, we therefor highly recommended to leave this disabled.

  • Exceptions: A list of different source and destination hosts that should never have their referer changed. For instance a rule with Source * and Destination * will pass referers of all website to any resource served at (including its subdomains).

  • Whitelist Source: An URL to a document that contains addional whitelist rules. The default whitelist tries to minimize the impact of this extension on everyday web surfing while still providing the maximum referer privacy possible under these circumstances. This may not be what you want.

    Misbehaviour in the face of spoofed referer is also not that common anymore, so most users should not experience any issues by disabling this feature entirely. (Which may be done simply by leaving the field empty.)

  • Referer mode: Can be used to change what is sent to the server instead of the original referer header. The default (Send the URL you're going to as referer) is known to cause the least issues on most sites and is therefor recommended.

A website is not working, what should I do?

If a website is not working properly the first thing you can try is making sure strict mode is disabled.

If the issue isn't solved, you can try adding an exeception for the domain by adding the source *.<> and the destination *. Allowing to access everything with the orignal referer you would therefor add * as the source and * as the destination.

Please also open an issue about it (even if you cannot find a solution) and we'll try to add the proper patterns to the autoupdated whitelist.