My site gets a cookie error in the console:

curiouswebster used Ask the Experts™
My site gets a cookie error in the console:

I use a plug-in called:

I decided to Inspect the page and found these errors...


JQMIGRATE: Migrate is installed, version 1.4.1

A cookie associated with a cross-site resource at was set without the `SameSite` attribute. A future release of Chrome will only deliver cookies with cross-site requests if they are set with `SameSite=None` and `Secure`. You can review cookies in developer tools under Application>Storage>Cookies and see more details at and

The provided value 'moz-chunked-arraybuffer' is not a valid enum value of type XMLHttpRequestResponseType.
e @ pdf.worker.js:1


This is a new site, but I am not promoting it yet. I have no Terms of Use, but plan to do that. I guess what I can conclude from this error is that the plug-in (mention above) uses a cookie.

What shall I do about this error? What does it mean?

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these are not errors but warnings

Same Site cookie flag is a way to set cookies for security.
There are 3 possibles value, LAX is the one I use fo my custom cookies


samesite=Lax, that cookie will not be passed for any cross-domain requests unless it is a regular link to the target site.
Other methods like POST and PUTand XHR requests will not contain this cookie.


samesite=Strict, that cookie will not be sent for any cross-domain requests, even if it is regular link to the target site, the cookie will not be sent.

None Experimental

More info

Note Same-site cookies is compatible with PHP 7.3+

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PHP custom cookie
setcookie('cookie_name', 'cookie_value', ['samesite' => 'Lax']);

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curiouswebsterSoftware Engineer



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