{"id":8978,"date":"2021-02-09T09:17:26","date_gmt":"2021-02-09T17:17:26","guid":{"rendered":"http:\/\/blog.mozilla.org\/addons\/?p=8978"},"modified":"2021-02-14T11:49:57","modified_gmt":"2021-02-14T19:49:57","slug":"extensions-in-firefox-86","status":"publish","type":"post","link":"https:\/\/blog.mozilla.org\/addons\/2021\/02\/09\/extensions-in-firefox-86\/","title":{"rendered":"Extensions in Firefox 86"},"content":{"rendered":"<p>Firefox 86 will be released on February 23, 2021. We\u2019d like to call out two highlights and several bug fixes for the WebExtensions API that will ship with this release.<\/p>\n<h2>Highlights<\/h2>\n<ul>\n<li aria-level=\"1\">Extensions that have <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Add-ons\/WebExtensions\/manifest.json\/permissions#host_permissions\">host permissions<\/a> for tabs no longer need to request the broader \u201ctabs\u201d permission to have access to the tab URL, title, and favicon URL.<\/li>\n<li aria-level=\"1\">As part of our work on Manifest V3, we have landed an experimental base content security policy (CSP) behind a preference in Firefox 86.\u00a0 The new CSP disallows remote code execution. This restriction only applies to extensions using <code><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Add-ons\/WebExtensions\/manifest.json\/manifest_version\">manifest_version 3<\/a><\/code>, which is not currently supported in Firefox (currently, only <code>manifest_version 2<\/code> is supported). If you would like to test the new CSP for extension pages and content scripts, you must change your extension\u2019s <code>manifest_version<\/code> to 3 and set <code>extensions.manifestv3.enabled<\/code> to <code>true<\/code> in <code>about:config<\/code>. Because this is a highly experimental and evolving feature, we want developers to be aware that extensions that work with the new CSP may break tomorrow as more changes are implemented. <\/li>\n<\/ul>\n<h2>Bug fixes<\/h2>\n<ul>\n<li aria-level=\"1\">Redirected URIs can now be set to a loopback address in the <code><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Add-ons\/WebExtensions\/API\/identity\/launchWebAuthFlow\">identity.launchWebAuthFlow<\/a><\/code> API. This fix makes it possible for extensions to successfully integrate with OAuth authentication for some common web services like Google and Facebook. This will also be uplifted to <a href=\"https:\/\/www.mozilla.org\/firefox\/enterprise\/\">Firefox Extended Support Release<\/a> (ESR) 78.<\/li>\n<li aria-level=\"1\">Firefox 76 introduced a regression where <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Add-ons\/WebExtensions\/API\/webRequest\/StreamFilter\">webRequest.StreamFilter<\/a> did not disconnect after an API, causing the loading icon on tabs to run persistently. We\u2019ve also fixed <a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1678734\">a bug<\/a> that caused crashes when using view-source requests.<\/li>\n<li aria-level=\"1\">The zoom levels for the extensions options pages embedded in the Firefox Add-ons Manager (about:addons) tabs should work as expected.<\/li>\n<li aria-level=\"1\">Now that the tabs hiding API is enabled by default, the <code>extensions.webextensions.tabhide.enabled<\/code> preference is no longer displayed and references to it have been removed.<\/li>\n<\/ul>\n<p>As a quick note, going forward we\u2019ll be publishing release updates in the <a href=\"https:\/\/developer.mozilla.org\/docs\/Mozilla\/Firefox\/Releases\">Firefox developer release notes<\/a> on <a href=\"https:\/\/developer.mozilla.org\/\">MDN.<\/a> We will still announce major changes to the WebExtensions API, like new APIs, significant enhancements, and deprecation notices, on this blog as they become available.<\/p>\n<h2>Thanks<\/h2>\n<p>Many thanks to community members Sonia Singla, Tilden Windsor, robbendebiene, and Brenda Natalia for their contributions to this release!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Firefox 86 will be released on February 23, 2021. We\u2019d like to call out two highlights and several bug fixes for the WebExtensions API that will ship with this release. &hellip; <a class=\"go\" href=\"https:\/\/blog.mozilla.org\/addons\/2021\/02\/09\/extensions-in-firefox-86\/\">Read more<\/a><\/p>\n","protected":false},"author":1405,"featured_media":8750,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44,121,227],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Extensions in Firefox 86 - Mozilla Add-ons Community Blog<\/title>\n<meta name=\"description\" content=\"Extension developers can expect these changes to the WebExtensions API in Firefox 86, to be released on February 23, 2021.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.mozilla.org\/addons\/2021\/02\/09\/extensions-in-firefox-86\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Caitlin Neiman\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.mozilla.org\/addons\/2021\/02\/09\/extensions-in-firefox-86\/\",\"url\":\"https:\/\/blog.mozilla.org\/addons\/2021\/02\/09\/extensions-in-firefox-86\/\",\"name\":\"Extensions in Firefox 86 - 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