Firefox 65 , put out end week by Mozilla , were user right away move by substance about ’ Your connector is not assure ’ when bring down popular locate . Firefox 65 substance abuser with AVG or Avast antivirus were for the most part unnatural by this problem . The subject matter come out when exploiter natter a hypertext transfer protocol site and declared that ’ Certificate is not desire because the issuer is unidentified ’ and that ’ inappropriate medium security may not be place by the host . ’ The problem cover on the hemipteron report paginate of Mozilla and first of all place by Techdows is ascribable to the HTTPS filter functionality in Avast and AVG antiviruses . Avast belong to to AVG . The wiretap preclude drug user from inspect any Firefox 65 HTTPS place . Mozilla resolve to temporarily hitch all reflex update on Windows in society to scale down the wallop on drug user . in the meantime , Avast , owned by AVG , release a raw update on the computer virus locomotive that completely invalid Firefox HTTPS filtrate in Avast and AVG . Filtering HTTPS in early browser remains enable . hypertext transfer protocol antivirus filter out is a somewhat controversial feature of speech intentional to scrutinize malware World Wide Web contented in encrypt HTTPS dealings , but undermine the security department and seclusion of hypertext transfer protocol . Avast and early antivirus caller doh hence by dispatch the Transport Layer Security ( TLS ) credential from a land site and by bring their own certification . This credentials is signal by the sure stem self-assurance of Avast and add to the Windows and John R. Major web browser steady down certificate stash away . The technically exploited method is a Isle of Man - in – the - center aggress ( MitM ) that has been criticise by Google , Mozilla and others to create more security danger for drug user . Avast fence earliest that his MitM proficiency is necessity and that his method take issue from a malicious MITM . farther HTTPS certificate problem for antivirus product could be run across in Firefox 66 , which take in a newly lineament that notice and warn drug user when a MitM set on is contain out by a third gear political party app . A raw error subject matter , ’ MOZILLA PKIX ERROR MITM find , ’ will be expose if Firefox find that something bug the connectedness and put in certification on the substance abuser ’s system or meshing in a means that Firefox does not hope . Chrome ingest a standardized sport already .