{"id":170033,"date":"2025-05-26T09:19:12","date_gmt":"2025-05-26T09:19:12","guid":{"rendered":"https:\/\/linuxiac.com\/?p=170033"},"modified":"2025-05-26T10:50:40","modified_gmt":"2025-05-26T10:50:40","slug":"firefox-139-now-available-for-download-heres-whats-new","status":"publish","type":"post","link":"https:\/\/linuxiac.com\/firefox-139-now-available-for-download-heres-whats-new\/","title":{"rendered":"Firefox 139 Now Available for Download, Here\u2019s What\u2019s New"},"content":{"rendered":"\n<p>Almost a month after releasing <a href=\"https:\/\/linuxiac.com\/firefox-138-now-available-for-download\/\">version 138<\/a>, Mozilla has launched Firefox 139, the latest update to its popular open-source web browser, now available for download.<\/p>\n\n\n\n<p>The main highlight of the new version is that Firefox can now perform full-page translations inside extension pages, not just on ordinary websites.<\/p>\n\n\n\n<p>Moreover, PNG images keep their transparency when pasted into the browser, a quality-of-life tweak designers have requested for ages.<\/p>\n\n\n\n<p>Uploading large files should also feel snappier on high-bandwidth, high-latency lines, thanks to better HTTP\/3 performance during 0-RTT resumption.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/linuxiac.com\/wp-content\/uploads\/2025\/05\/firefox139-app.jpg\"><img decoding=\"async\" width=\"1024\" height=\"676\" src=\"https:\/\/linuxiac.com\/wp-content\/uploads\/2025\/05\/firefox139-app-1024x676.jpg\" alt=\"Mozilla Firefox 139 Web Browser\" class=\"wp-image-170051\" srcset=\"https:\/\/linuxiac.com\/wp-content\/uploads\/2025\/05\/firefox139-app-1024x676.jpg 1024w, https:\/\/linuxiac.com\/wp-content\/uploads\/2025\/05\/firefox139-app-380x251.jpg 380w, https:\/\/linuxiac.com\/wp-content\/uploads\/2025\/05\/firefox139-app-768x507.jpg 768w, https:\/\/linuxiac.com\/wp-content\/uploads\/2025\/05\/firefox139-app-1536x1015.jpg 1536w, https:\/\/linuxiac.com\/wp-content\/uploads\/2025\/05\/firefox139-app.jpg 1729w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Mozilla Firefox 139 Web Browser<\/figcaption><\/figure>\n\n\n\n<p>Under the hood, there are some interesting additions targeting developers, and more specifically:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Temporal API enabled by default<\/strong> \u2013 Firefox becomes the first major browser to ship the long-awaited replacement for JavaScript\u2019s quirky <code>Date<\/code> object, promising far saner date-time handling for web apps.<\/li>\n\n\n\n<li><strong>Service Workers in Private Browsing<\/strong> \u2013 Encrypted storage now lets background tasks run even while users stay in private mode, expanding what PWAs can do without compromising privacy.<\/li>\n\n\n\n<li><strong>WebAuthn <em>largeBlob<\/em> extension<\/strong> \u2013 Sites that store credential-bound blobs (think encrypted keys or extra metadata) get first-class support.<\/li>\n\n\n\n<li><strong><code>requestClose()<\/code> for <code>&lt;dialog&gt;<\/code><\/strong>, <strong>timer throttling for Workers<\/strong>, and <strong><code>hidden=until-found<\/code><\/strong> all become available, each nudging Firefox closer to spec parity with Chromium.<\/li>\n\n\n\n<li>Enhanced <strong>searchability of closed <code>&lt;details&gt;<\/code> elements<\/strong> and correct text serialization from <code>window.getSelection().toString()<\/code>.<\/li>\n<\/ul>\n\n\n\n<p>Those eager to immediately download the latest version of Firefox can do so directly from&nbsp;<a href=\"https:\/\/ftp.mozilla.org\/pub\/firefox\/releases\/139.0\/\" target=\"_blank\" rel=\"noreferrer noopener\">Mozilla\u2019s server<\/a>.<\/p>\n\n\n\n<p>Windows and macOS users can expect an over-the-air update within the next day. Users of&nbsp;rolling-release Linux distributions should look for Firefox 138 as an update in their repositories over the next few days.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Firefox 139 open-source web browser introduces full-page translations in extension pages and improves PNG transparency.<\/p>\n","protected":false},"author":10,"featured_media":170036,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,5],"tags":[3636,2051],"class_list":["post-170033","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software","category-news","tag-browsers","tag-firefox"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/posts\/170033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/comments?post=170033"}],"version-history":[{"count":0,"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/posts\/170033\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/media\/170036"}],"wp:attachment":[{"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/media?parent=170033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/categories?post=170033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxiac.com\/wp-json\/wp\/v2\/tags?post=170033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}