vf-cleanup.js

// You can fill the below with lines that cover the paths you want to clear cookies for.
// We found that the issue started around November 4th, so we decided to clear cookies for
// all posts and category pages from October 15th onwards. The list of paths was generated
// by querying the CMS.

// The script also sets and checks a localStorage value to avoid reruns, and will be retired
// from production after a certain amount of time.

const p = [];

// For example, if you want to clear cookies for the following paths:
// BEGIN PATHS
p.push('/category/opinion/comment');
p.push('/category/competitions');
// END PATHS

if (JSON.parse(localStorage.getItem('vf-cleanup-finished')) !== true) {
	for (let index = 0; index < p.length; index++) {
		// You must add a Domain= attribute to this string with the relevant value
		document.cookie = '_vfa=;expires=Thu, 01 Jan 1970 00:00:01 GMT;path=' + p[index];
	}

	localStorage.setItem('vf-cleanup-finished', 'true');
	console.log ('VF Cleanup Complete');
} else {
    console.log ('VF Cleanup Not Required');
}