{"id":100191,"date":"2021-05-18T22:23:32","date_gmt":"2021-05-18T20:23:32","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kompaniya-mozilla-predstavila-rezhim-strogoj-izolyaczii-sajtov-dlya-firefox"},"modified":"2026-02-04T17:53:51","modified_gmt":"2026-02-04T15:53:51","slug":"kompaniya-mozilla-predstavila-rezhim-strogoj-izolyaczii-sajtov-dlya-firefox","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/kompaniya-mozilla-predstavila-rezhim-strogoj-izolyaczii-sajtov-dlya-firefox","title":{"rendered":"Mozilla har introduceret en streng hjemmesideisoleringsfunktion i Firefox","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Mozilla har annonceret, at de er begyndt p\u00e5 omfattende test af den strenge hjemmesideisolationsfunktion i nattebygninger og beta-udgivelser af Firefox, som er udviklet under Fission-projektet. Denne tilstand udvider anvendelsen af en multiprocess-arkitektur \u2014 i stedet for en fast pulje af processer, oprettes en separat proces for hver hjemmeside. Aktiveringen af Fission-tilstanden styres via variablen 'fission.autostart=true' i about:config eller p\u00e5 siden about:preferences#experimental. <\/p>\n

Det skal n\u00e6vnes, at den multiprocess-model, der hidtil er anvendt i Firefox, involverede opstart af en pulje af behandlingsprocesser: som standard 8 hovedprocesser til behandling af indhold, 2 yderligere ikke-priviligerede processer til webindhold og 4 hj\u00e6lpeprocesser til udvidelser, GPU-interaktion, netv\u00e6rksoperationer og dekodning af multimediedata. Fordelingen af faner p\u00e5 processer skete vilk\u00e5rligt; eksempelvis kunne der v\u00e6re behandling af en bank-side og en mist\u00e6nkelig ressourcers behandling i samme proces. <\/p>\n

Den nye tilstand skiller behandlingen af hver hjemmeside ud i en separat proces, ikke opdelt efter faner, men efter dom\u00e6ner, hvilket g\u00f8r det muligt yderligere at isolere indholdet af eksterne scripts og iframe-blokke. For separat behandling af underdom\u00e6ner til standardtjenester, der er relateret til forskellige hjemmesider, anvendes opdeling ikke efter formelle, men efter faktiske (eTLD) dom\u00e6ner. topniveau-dom\u00e6ner<\/a>, der er markeret i listen over offentlige suffikser (dvs. hjemmesiderne 'a.github.io' og 'b.github.io' vil blive k\u00f8rt i forskellige processer). <\/p>\n

Den strenge isolationsmode beskytter mod angreb gennem sidel\u00f8bende kanaler, eksempelvis relateret til s\u00e5rbarheder af Spectre-typen, som kan medf\u00f8re l\u00e6kage af oplysninger inden for \u00e9n proces. L\u00e6kage af fortrolige data, der behandles i samme proces, er mulig, n\u00e5r der udf\u00f8res ukorrekt eksternt kode i JIT-motorer. virtuelle maskiner<\/a>I webbrowseres kontekst kan ondsindet JavaScript-kode fra et websted f\u00e5 oplysninger om adgangskoder, adgangsn\u00f8gle og kreditkortsnumre, der indtastes p\u00e5 et andet websted, der behandles i samme proces. For at beskytte mod angreb via sidekanaler begr\u00e6nsede browserudviklere oprindeligt timerens n\u00f8jagtighed og blokerede adgangen til SharedArrayBuffer API'en, men disse foranstaltninger gjorde blot angrebene mere komplicerede og langsommere (f.eks. blev der for nylig foresl\u00e5et en metode til at udtr\u00e6kke data fra CPU-cache, der fungerer uden JavaScript overhovedet). <\/p>\n

Blandt de andre fordele ved Strict Site Isolation n\u00e6vnes reduktion af hukommelsesfragmentering, mere effektiv tilbagegivelse af hukommelse til operativsystemet, minimisering af indflydelsen fra garbage collection og intensive beregninger p\u00e5 sider i andre processer, forbedret belastningsfordeling p\u00e5 forskellige CPU-kerner samt \u00f8get stabilitet (et sammenbrud i processen, der h\u00e5ndterer iframe, vil ikke p\u00e5virke hovedwebstedet og andre faner). <\/p>\n

Blandt de kendte problemer, der opst\u00e5r ved brug af Fission, bem\u00e6rkes en markant stigning i hukommelsesforbruget, X11-forbindelser og filsdeskriptorer ved \u00e5bning af et stort antal faner, samt problemer med visse udvidelser, forsvinden af indholdet i iframe ved udskrivning og brugen af screenshot-funktioner, reduceret effektivitet af dokumentcache med iframe og tab af indhold i formularer, der er udfyldt, men ikke sendt ved genoprettelse af sessionen efter et sammenbrud.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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