Advanced Settings page says
This attempts to redirect to https://help.adblockplus.org/hc/articles/360062733293, but that page throws a 403 Error - and the links at https://help.eyeo.com/en/adblockplus/ (aka https://help.eyeo.com/en/?a6ae38bf) are no help; all those I've tried have led to similar 403 pages.YOUR CUSTOM FILTERS
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