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/* -*- js-indent-level: 2; indent-tabs-mode: nil -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Used by nsIBrowserUsage
export function getUniqueDomainsVisitedInPast24Hours() {
// The prompting heuristic for the storage access API looks at 1% of the
// number of the domains visited in the past 24 hours, with a minimum cap of
// 5 domains, in order to prevent prompts from showing up before a tracker is
// about to obtain tracking power over a significant portion of the user's
// cross-site browsing activity (that is, we do not want to allow automatic
// access grants over 1% of the domains). We have the
// dom.storage_access.max_concurrent_auto_grants which establishes the
// minimum cap here (set to 5 by default) so if we return 0 here the minimum
// cap would always take effect. That would only become inaccurate if the
// user has browsed more than 500 top-level eTLD's in the past 24 hours,
// which should be a very unlikely scenario on mobile anyway.
return 0;
}
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