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Firefox ESR (Windows) Policy Wildcards - Is it possible?

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Good afternoon,

We're currently trying to set up a Hardening Guide for Firefox ESR but are struggling with a few policies and setting wildcards.

For example, we're trying to set an origin in Cookies > Block Settings to something like "*", and we get the error "Ignoring parameter "*" - not a valid origin."

In Chrome / Edge you can set a wildcard like this: [*.]google.com for example - we receive the same error message for this.

Can you do such a thing for Firefox ESR without having to list every site you want to block?

ESR Version: 115.6.0esr (64-bit)

Kind Regards, Ethan Jerrum

Good afternoon, We're currently trying to set up a Hardening Guide for Firefox ESR but are struggling with a few policies and setting wildcards. For example, we're trying to set an origin in Cookies > Block Settings to something like "*", and we get the error "Ignoring parameter "*" - not a valid origin." In Chrome / Edge you can set a wildcard like this: [*.]google.com for example - we receive the same error message for this. Can you do such a thing for Firefox ESR without having to list ''every'' site you want to block? ESR Version: 115.6.0esr (64-bit) Kind Regards, Ethan Jerrum

Chosen solution

Are you using Firefox policies?

With the cookie policy:

https://mozilla.github.io/policy-templates/#cookies

You set it to reject all cookies ("reject") and then specify the sites to allow.

I've attached a screenshot of where this is in the Firefox UI.

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All Replies (4)

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If you say https://google.com and http://google.com permissions, it will block subdomains as well.

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Hi Mike,

Yes this is good but we want to Block all sites from setting cookies apart from those in the Allowed Sites list, does this make sense?

Kind Regards, Ethan

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Chosen Solution

Are you using Firefox policies?

With the cookie policy:

https://mozilla.github.io/policy-templates/#cookies

You set it to reject all cookies ("reject") and then specify the sites to allow.

I've attached a screenshot of where this is in the Firefox UI.

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Thank you Mike,

This makes sense now.

Kind Regards, Ethan