Firefox 160 adds Mini Windows feature, mailto blocking option & PiP playback speed control

Mozilla has released Firefox 160, bringing a series of quality-of-life improvements to the popular open-source web browser. Among the headline features is an upgraded Picture-in-Picture player, which now includes a playback speed setting allowing users to watch videos anywhere from 0.25x to 2.0x speed; a welcome addition for anyone who wants to breeze through tutorials or slow down lectures. The speed control appears whenever the player window is medium-sized or larger. Alongside it comes a new Mini Window feature, which lets users pop out a tab, or just a selected portion of a page, into an always-on-top window that stays visible while browsing elsewhere.

Productivity-focused users also get meaningful upgrades in this release. History entries can now be dragged directly from the sidebar onto the tab strip to reopen them in new tabs, while a smarter address bar context menu shows “Paste and Search” instead of “Paste and Go” when Firefox detects that the copied text is a search term rather than a web address. Accessibility saw attention as well: pages saved as PDFs now expose mathematical content written in MathML to assistive technologies such as screen readers. Users frustrated by websites repeatedly pestering them to open email (mailto:) and other links in external apps can now hit a new “Never allow” button, with blocked sites manageable later in the settings.

Under the hood, Firefox 160 expands media support and platform polish. The browser can now play Matroska (MKV) files containing FLAC, MP3, or PCM audio tracks. On macOS, WebGL content is now rendered through Apple's Metal graphics API, a change that can boost performance on some sites. Meanwhile, Smart Window's Organize Tabs feature gains French-language support, with Firefox able to suggest groups of related open tabs and name each group in French for francophone users.