[-Fx-] Firefox 147.0 Released
官方版本148.0預計在 2026年02月24日(美國時間) 台灣時間02月24日~02月25日 更新
147.0.4 Release Note
https://www.mozilla.org/en-US/firefox/147.0.4/releasenotes/
Fixed:
Fixed an issue that could cause the New Tab Page to appear blank for some
users. (Bug 2014616)
https://bugzilla.mozilla.org/show_bug.cgi?id=2014616
Security fix.
https://www.mozilla.org/security/advisories/mfsa2026-10/
147.0.3 Release Note
https://www.mozilla.org/en-US/firefox/147.0.3/releasenotes/
New︰
Interoperability improvements for the CSS anchor positioning and Navigation
web APIs.
Fixed︰
Fixed a regression where position: sticky elements on some webpages could
appear stuck or fail to update while mousewheel-scrolling after certain
:hover interactions. (Bug 2010481)
https://bugzilla.mozilla.org/show_bug.cgi?id=2010481
Fixed an issue where the Firefox Developer Tools could fail to re-open
after using the Inspector’s node picker and reloading a page containing
cross-origin iframes. (Bug 2003810)
https://bugzilla.mozilla.org/show_bug.cgi?id=2003810
Fixed an issue where the DNS over HTTPS provider settings section could
appear as a blank box, preventing users from seeing the current setting or
changing it. (Bug 2010501)
https://bugzilla.mozilla.org/show_bug.cgi?id=2010501
Fixed an issue on Windows systems with a large number of fonts installed
where parts of the Firefox UI (tabs, menus, and Settings) could display
garbled characters or symbols instead of readable text. (Bug 2012950)
https://bugzilla.mozilla.org/show_bug.cgi?id=2012950
Unresolved︰
On Linux (Wayland) systems, certain popups and context menus will sometimes
open in the wrong place, such as the top-left corner of the window. Firefox
147.0.3 has a partial mitigation for this problem and remaining instances
will be addressed in a future release. (Bug 2003045)
https://bugzilla.mozilla.org/show_bug.cgi?id=2003045
147.0.2 Release Note
https://www.mozilla.org/en-US/firefox/147.0.2/releasenotes/
New︰
Firefox now allows you to customize your keyboard shortcuts to replace
hard-to-type or hard-to-remember hotkeys, eliminate conflicts with other
software, and create your preferred set. Access this experimental new feature
by typing about:keyboard in the address bar.
Fixed︰
Resolved various issues with missing or impaired browser functionality
when using XDG Base Directories on Linux. (Bug 2011300)
https://bugzilla.mozilla.org/show_bug.cgi?id=2011300
Fixed an issue causing excess passkey prompts to appear when logging into
some sites. (Bug 2010919)
https://bugzilla.mozilla.org/show_bug.cgi?id=2010919
Fixed an issue that could lead to sites being incorrectly flagged as
malicious by SafeBrowsing. (Bug 2010956)
https://bugzilla.mozilla.org/show_bug.cgi?id=2010956
Various security fixes.
https://www.mozilla.org/security/advisories/mfsa2026-06/
147.0.1 Release Note
https://www.mozilla.org/en-US/firefox/147.0.1/releasenotes/
Fixed︰
Fixed compatibility problems with websites that use the new Compression
Dictionaries technology, such as ChatGPT, by temporarily disabling the
feature. (Bug 2010712)
https://bugzilla.mozilla.org/show_bug.cgi?id=2010712
Fixed an issue where an unnecessary empty directory was created on Linux
systems. (Bug 2001887)
https://bugzilla.mozilla.org/show_bug.cgi?id=2001887
Fixed an issue where time formats could cause certain websites to display
incorrectly. (Bug 2010411)
https://bugzilla.mozilla.org/show_bug.cgi?id=2010411
147.0 Release Note
https://www.mozilla.org/en-US/firefox/147.0/releasenotes/
New︰
WebGPU support is now enabled for devices with Apple Silicon processors on
all supported macOS versions.
Improved video playback performance on systems with AMD GPUs by enabling
zero-copy playback for hardware-decoded video where supported, bringing them
to parity with Intel and NVIDIA GPUs.
Firefox now supports the Safe Browsing V5 protocol and is migrating from
Safe Browsing V4 to the local list mode of Safe Browsing V5 protocol.
https://developers.google.com/safe-browsing/reference
https://developers.google.com/safe-browsing/reference/Local.List.Mode
Users with Enhanced Tracking Protection (ETP) set to Strict will have local
network access restrictions enabled by default. Firefox will now require
users to explicitly allow public websites to access local network resources.
https://is.gd/M4z9lB
Firefox now supports the Freedesktop.org XDG Base Directory Specification.
https://specifications.freedesktop.org/basedir/latest/
A Picture-in-Picture player window can now optionally be opened
automatically for a video playing in a tab when that tab goes into the
background. A special thanks to volunteer Daniele Ferla for contributing this
feature!
https://i.meee.com.tw/DXcp2go.png

Fixed︰
Fixed an issue that prevented some Windows users from selecting a tab
when the cursor was at the top of the screen and the Firefox window was
maximized.
Fixed a bug that made HTTP/3 requests containing non-UTF-8 header values
time out or fall back to HTTP/2 after a while.
A draggable button can now be dragged if initiated from the button itself.
For Linux GNOME Mutter users, window and rendering surface sizes were
updated to match the actual pixel grid so Firefox delivers sharp rendering on
fractionally scaled displays regardless of the actual window size.
Various security fixes.
https://www.mozilla.org/security/advisories/mfsa2026-01/
Changed︰
Firefox now uses the same quality values (q-values) in Accept-Language
headers as other major browsers. The second language preference is now sent
as q=0.9 instead of q=0.5, with subsequent language preferences decreasing by
0.1 each (minimum 0.1). This change fixes compatibility issues with some
servers that incorrectly rejected requests with lower quality values.
Enterprise︰
https://support.mozilla.org/kb/firefox-enterprise-147-release-notes
Developer︰
View Transitions: View transition pseudo-elements now appear in the
elements panel and the associated animations appear in the animations panel.
Anchor positioning: Elements with a valid anchor-name are given an 'anchor'
badge in the elements view, and @position-try CSS rules are now displayed in
the CSS rules panel when an element using position-try-fallbacks is selected.
The JSON viewer now has a button to import the resource into Firefox
Profiler to get a breakdown of its size.
Pseudo-element selectors can now be added/edited in the CSS rules panel.
Web Platform︰
Added support for the Navigation API. This API provides the ability to
initiate, intercept, and manage browser navigation actions. It is a successor
to previous web platform features such as the History API and
window.location, which solves their shortcomings.
https://developer.mozilla.org/docs/Web/API/Navigation_API
The Unicode ICU library was updated to release 78, bringing support for
Unicode 17 and new locales.
https://github.com/unicode-org/icu/releases/tag/release-78.1
https://blog.unicode.org/2025/09/unicode-170-release-announcement.html
ES modules in service workers are now supported, aligning Firefox with
other major browsers and improving compatibility for modern web apps.
Support for CSS Module Scripts was added, allowing stylesheets to be
imported using the JavaScript module system and import attributes.
https://mzl.la/3NiZfn9
The CSS counter-* and quotes properties are now supported in the ::marker
pseudo-element.
Both CompressionStream and DecompressionStream now support the Brotli
format.
Firefox now supports the :active-view-transition-type selector and
associated View Transitions API changes.
https://developer.mozilla.org/docs/Web/API/Document/startViewTransition#types
https://developer.mozilla.org/docs/Web/API/View_Transition_API
Firefox now exposes the view transition currently active on the document
via the Document.activeViewTransition property.
https://developer.mozilla.org/docs/Web/API/Document/activeViewTransition
Support for CSS anchor positioning was added, enabling tethering
elements. The anchor-positioned elements can then have their size and
position set relative to the anchor elements to which they are bound.
https://developer.mozilla.org/docs/Web/CSS/CSS_anchor_positioning
Firefox now supports Storage-Access-Headers, allowing servers to opt into
unpartitioned cookies via HTTP headers if storage-access was granted prior to
the Storage Access API.
https://developer.mozilla.org/docs/Web/API/Storage_Access_API
Implemented CSS root-font-relative units rcap, rch, rex and ric.
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