{"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\/pt\/blog\/news\/kompaniya-mozilla-predstavila-rezhim-strogoj-izolyaczii-sajtov-dlya-firefox","title":{"rendered":"A empresa Mozilla apresentou o modo de isolamento rigoroso de sites para o Firefox","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Mozilla anunciou o in\u00edcio dos testes em larga escala nas vers\u00f5es noturnas e beta do Firefox para o modo de isolamento estrito de sites, que est\u00e1 sendo desenvolvido como parte do projeto Fission. Este modo amplia a utiliza\u00e7\u00e3o da arquitetura multiprocessos \u2014 em vez de um pool fixo de processos, um processo separado \u00e9 criado para cada site. O gerenciamento da ativa\u00e7\u00e3o do modo Fission \u00e9 feito atrav\u00e9s da vari\u00e1vel \"fission.autostart=true\" em about:config ou na p\u00e1gina about:preferences#experimental. <\/p>\n

Vale lembrar que o modelo multiprocessado usado no Firefox at\u00e9 agora implicava na execu\u00e7\u00e3o de um pool de processos manipuladores: por padr\u00e3o, 8 processos principais para processamento de conte\u00fado, 2 processos adicionais n\u00e3o privilegiados para web e 4 processos auxiliares para complementos, intera\u00e7\u00e3o com GPU, opera\u00e7\u00f5es de rede e decodifica\u00e7\u00e3o de dados multim\u00eddia. A distribui\u00e7\u00e3o de guias entre os processos era feita de maneira aleat\u00f3ria, por exemplo, um processo poderia lidar com o site de um banco e um recurso duvidoso. <\/p>\n

O novo modo aloca o processamento de cada site em um processo separado, dividindo n\u00e3o por guias, mas por dom\u00ednios, o que permite isolar ainda mais o conte\u00fado de scripts externos e blocos iframe. Para o processamento separado de subdom\u00ednios de servi\u00e7os t\u00edpicos relacionados a diferentes sites, aplica-se a divis\u00e3o n\u00e3o por formalidades, mas por realidades (eTLD). dom\u00ednios de n\u00edvel superior<\/a>, listado na lista Public Suffix (ou seja, os sites \"a.github.io\" e \"b.github.io\" ser\u00e3o executados em processos diferentes). <\/p>\n

O modo de estrita isolamento permite prote\u00e7\u00e3o contra ataques por canais laterais, por exemplo, relacionados a vulnerabilidades do tipo Spectre, que podem levar ao vazamento de informa\u00e7\u00f5es dentro de um \u00fanico processo. O vazamento de dados confidenciais processados no mesmo processo pode ocorrer durante a execu\u00e7\u00e3o de c\u00f3digo externo duvidoso em motores com JIT e em m\u00e1quinas virtuais<\/a>. No contexto dos navegadores web, c\u00f3digos JavaScript maliciosos de um site podem obter informa\u00e7\u00f5es sobre senhas, chaves de acesso e n\u00fameros de cart\u00f5es de cr\u00e9dito inseridos em outro site, que est\u00e1 sendo processado no mesmo processo. Inicialmente, para proteger contra ataques de canal lateral, os desenvolvedores de navegadores limitaram a precis\u00e3o do temporizador e bloquearam o acesso \u00e0 API SharedArrayBuffer, mas essas medidas apenas dificultavam e tornavam mais lentos os ataques (por exemplo, recentemente foi proposto um m\u00e9todo para extrair dados do cache da CPU que funciona sem JavaScript). <\/p>\n

Entre outras vantagens do modo de estrita isola\u00e7\u00e3o, menciona-se a redu\u00e7\u00e3o da fragmenta\u00e7\u00e3o de mem\u00f3ria, uma devolu\u00e7\u00e3o mais eficiente da mem\u00f3ria ao sistema operacional, a minimiza\u00e7\u00e3o do impacto da coleta de lixo e de c\u00e1lculos intensivos em p\u00e1ginas de outros processos, o aumento da efici\u00eancia na distribui\u00e7\u00e3o de carga entre diferentes n\u00facleos de CPU e a melhoria da estabilidade (a falha do processo que manipula um iframe n\u00e3o comprometer\u00e1 o site principal e outras abas). <\/p>\n

Entre os problemas conhecidos que surgem com o uso do Fission, destaca-se o aumento not\u00e1vel no consumo de mem\u00f3ria, conex\u00f5es X11 e descritores de arquivos ao abrir um grande n\u00famero de abas, bem como a falha de algumas extens\u00f5es, a perda de conte\u00fado de iframes ao imprimir e ao chamar a fun\u00e7\u00e3o de captura de tela, a diminui\u00e7\u00e3o da efici\u00eancia no cache de documentos com iframes, e a perda do conte\u00fado de formul\u00e1rios preenchidos, mas n\u00e3o enviados, ao restaurar a sess\u00e3o ap\u00f3s uma falha.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mozilla \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u043d\u0430\u0447\u0430\u043b\u0435 \u043c\u0430\u0441\u0441\u043e\u0432\u043e\u0433\u043e \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043d\u043e\u0447\u043d\u044b\u0445 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 \u0438 \u0431\u0435\u0442\u0430-\u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 Firefox \u0440\u0435\u0436\u0438\u043c\u0430 \u0441\u0442\u0440\u043e\u0433\u043e\u0439 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u0441\u0430\u0439\u0442\u043e\u0432, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0432\u0448\u0435\u0433\u043e\u0441\u044f \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Fission. \u0420\u0435\u0436\u0438\u043c \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043c\u043d\u043e\u0433\u043e\u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043d\u043e\u0439 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b — \u0432\u043c\u0435\u0441\u0442\u043e \u0444\u0438\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043f\u0443\u043b\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432, \u043d\u0430 \u043a\u0430\u0436\u0434\u044b\u0439 \u0441\u0430\u0439\u0442 \u0441\u043e\u0437\u0434\u0430\u0451\u0442\u0441\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441. \u0423\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435\u043c \u0440\u0435\u0436\u0438\u043c\u0430 Fission \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0447\u0435\u0440\u0435\u0437 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e «fission.autostart=true» \u0432 about:config \u0438\u043b\u0438 \u043d\u0430 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0435 about:preferences#experimental. \u041d\u0430\u043f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u0430\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-100191","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 A Mozilla apresentou o modo de estrita isola\u00e7\u00e3o de sites para o Firefox | ProHoster","description":"A Mozilla anunciou o in\u00edcio dos testes em larga escala nas vers\u00f5es noturnas e beta do Firefox do modo de estrita isola\u00e7\u00e3o de sites, que est\u00e1 sendo desenvolvido no \u00e2mbito do projeto Fission.","canonical_url":"https:\/\/prohoster.info\/pt\/blog\/news\/kompaniya-mozilla-predstavila-rezhim-strogoj-izolyaczii-sajtov-dlya-firefox","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pt_PT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mozilla \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u0440\u0435\u0436\u0438\u043c \u0441\u0442\u0440\u043e\u0433\u043e\u0439 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u0441\u0430\u0439\u0442\u043e\u0432 \u0434\u043b\u044f Firefox | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mozilla \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u043d\u0430\u0447\u0430\u043b\u0435 \u043c\u0430\u0441\u0441\u043e\u0432\u043e\u0433\u043e \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043d\u043e\u0447\u043d\u044b\u0445 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 \u0438 \u0431\u0435\u0442\u0430-\u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 Firefox \u0440\u0435\u0436\u0438\u043c\u0430 \u0441\u0442\u0440\u043e\u0433\u043e\u0439 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u0441\u0430\u0439\u0442\u043e\u0432, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0432\u0448\u0435\u0433\u043e\u0441\u044f \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Fission.","og:url":"https:\/\/prohoster.info\/pt\/blog\/news\/kompaniya-mozilla-predstavila-rezhim-strogoj-izolyaczii-sajtov-dlya-firefox","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2021-05-18T20:23:32+00:00","article:modified_time":"2026-02-04T15:53:51+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"100191","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-05-18 21:00:07","updated":"2026-02-04 15:53:51","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/100191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/comments?post=100191"}],"version-history":[{"count":2,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/100191\/revisions"}],"predecessor-version":[{"id":164131,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/100191\/revisions\/164131"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/media?parent=100191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/categories?post=100191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/tags?post=100191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}