How to block cookies on Firefox?

I want to block cookies from certain websites.
I look at set cookies, and then put it in the "manage exceptions" list and set them to block.

For instance, if in my stored cookies like, I see facebook.com.
Then, when I put in in my blocked list, should I put facebook.com or www.facebook.com?
Is there a rule to put in wildcards? *.facebook.com?

 

Rather than blocking cookies by hand I suggest using Privacy Badger. It watches sites' access to the cookie store and blocks content (cookies, images, etc.) which appear to be tracking you without your consent.

I also suggest looking at Firefox Multi-Account Containers. This add-on sandboxes specified web sites which is a fancy way of saying that if you have Facebook in the Facebook container it cannot see or touch anything in your Google Mail container and vice-versa.

 

Thanks. Both of them seem useful addons.

For Facebook, twitter: I do not go on those sites, but still cookies from them appear in my stored cookies.

 

Check these settings:

Code:

network.cookie.thirdparty.sessionOnly
network.cookie.lifetimePolicy
network.cookie.cookieBehavior
network.cookie.same-site.enabled

Also, consider setting

Code:

privacy.clearOnShutdown.cookies

to true.

Some of the above can be set from

Code:

about:preferences#privacy

, others require about:config or editing mozilla.cfg.

One of the easiest ways to selectively "block" (notice the quotation marks) selected domains is to install local DNS server that will use custom blocklist and return NXDOMAIN to all undesirable queries.

Let me know if some clarification is needed.

 

Right, because third party sites use Facebook and Twitter for user authentication and trackers use them for user tracking. Privacy Badger looks at these cookies and determines if they are being used for tracking. If they are then the add-on blocks their use. That is, if a Facebook cookie-using tracker tries to use the Facebook cookies to track you then Privacy Badger blocks that access and your browser becomes invisible to that tracker.

It's a lot easier and more reliable than trying to hand-manage cookies.

If you choose to dive down this hole then I can reccomend Pi-Hole although this does require a dedicated machine or VM if you're on Windows (Pi-Hole does not yet run properly under WSL). Pi-Hole can be run directly on Linux machines. No experience trying to run it on MacOS or other UNIXen.

 

Have you tried these? I use custom settings to block 3rd party cookies. https://support.mozilla.org/en-US/kb/content-blocking

 

Thanks. I was not aware of that - I was just doing it by cookie management in privacy settings.

 

This will work but it's a sledge hammer. It can break things like federated identity/authentication systems.

 

It was working beautifully and after 64.x it always warns certain site gets blocked, so I custom with basic protection. So website breaking occurred ever since. Be it banking or Paypal or Gpay.

 

I don't use Google Pay but I've had no problems with either banking or PayPal letting Privacy Badger do its thing.