推 leon19790602: 換圖標記得154就有了，不過這155也跳真快 09/02 15:39
官方版本156.0預計在 2026年09月15日(美國時間) 台灣時間09月15日~09月16日 更新
(看schedule 之後好像半個月一個版本 @@)
155.0 Release Note
https://www.mozilla.org/en-US/firefox/155.0/releasenotes/
New︰
Smart Window is now available for all users in the USA, Canada, and France
to try out! Additionally, Firefox 155 includes many new enhancements:
https://www.firefox.com/smart-window
New personalized resume conversation starters help users quickly return
to topics they’ve been working on.
https://i.meee.com.tw/cxbV4eB.png
。Assistant now responds much faster with Exa web search source citations
to provide accurate, trustworthy web grounding in roughly 1/5 the time.
https://i.meee.com.tw/40jR7C6.png
。Organize Tabs now suggests better groupings of your related tabs and
gives each group a clearer, more descriptive name.
https://i.meee.com.tw/9D1cdlo.png
Firefox now shows how many trackers it has blocked in the address bar,
making built-in privacy protections easier to see while browsing. The count can
be hidden in settings without turning off tracker blocking.
https://i.meee.com.tw/ddkUdzy.gif
Nintendo Switch Pro and compatible aftermarket controllers now work fully
in web games on Windows, with the directional pad and analog sticks correctly
mapped.
Containers can now be reordered in Settings, and the new order is used
wherever containers are listed.
https://i.meee.com.tw/CiqEdNo.png
The Translations feature now supports the following languages:
。Marathi
。Urdu
Fixed︰
Fixed text disappearing in Microsoft 365 Word Online and other web apps on
Linux when typing with certain keyboard layouts.
Fixed an unnecessary paste confirmation appearing when using the keyboard
shortcut to paste without formatting in Google Docs.
Firefox now recovers from the toolbar and tab strip being left unresponsive
when the platform fails to end a tab drag session.
Fixed text inside buttons not being selectable or copyable, which prevented
copying direct messages on X and comments on YouTube.
Fixed live audio streams such as internet radio stopping when playing in
the background.
Fixed the sound indicator disappearing from a tab that was moved to another
window, leaving no way to see or mute what was playing.
Fixed Firefox preventing Linux systems from going to sleep after a long
browsing session.
Fixed full screen content being letterboxed on MacBooks with a camera notch
, most visibly when watching video.
Fixed arrow-key and Page Up/Down scrolling not working on some pages with
embedded content from other sites.
Fixed characters from some less common scripts appearing as empty boxes on
web pages on Windows.
Fixed WebCodecs VideoEncoder hanging on macOS when encoding a VideoFrame in
NV12 format.
Various security fixes.
https://www.mozilla.org/security/advisories/mfsa2026-82/
Changed︰
Firefox now limits CSS to 75 levels of nested blocks and functions,
preventing crashes that extremely deep nesting can cause under some
circumstances. More deeply nested rules and values no longer parse.
Firefox now uses firefox-portal-detection.com instead of
detectportal.firefox.com to detect captive portals and check network
connectivity, so network allowlists referencing the old domain need updating.
Firefox now opens mailto: links only in response to an explicit user action
, so pages can no longer launch the default mail client unprompted.
PDFs smaller than the paper size can now be enlarged to fill the sheet when
printing, by setting the scale above 100%.
Enterprise︰
https://firefox-admin-docs.mozilla.org/release-notes/version/firefox-155/
Developer︰
https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/155
The Rules View now offers toggles to emulate the prefers-reduced-motion
media feature. Emulation options have also moved into a new panel behind the
at-rules (@) button.
https://mzl.la/4gKhM6I
The Debugger in Developer Tools now has a keyboard shortcut, Ctrl+Alt+B
(Cmd+Alt+B on macOS), to enable or disable all breakpoints at once.
The JSON Viewer now displays JSON Lines (JSONL/NDJSON) documents, including
inline errors for invalid lines.
Fixed the Storage panel showing cookies from private windows, containers,
and other partitions alongside the inspected page's own cookies.
Uncaught non-Error exceptions now list their property names in the Console
instead of showing only Object.
Web Platform︰
The CSS attr() function now supports values of any type, so authors can use
attribute values in any property rather than only as strings in the content
property.
https://developer.mozilla.org/docs/Web/CSS/Reference/Values/attr
Firefox now supports the progress() CSS function.
https://developer.mozilla.org/docs/Web/CSS/Reference/Values/progress
Firefox now supports the alpha() CSS function. This is a relative color
function that can be used to modify just the alpha component of a given color.
https://developer.mozilla.org/docs/Web/CSS/Reference/Values/color_value/alpha
Firefox now supports the Promise.allKeyed and Promise.allSettledKeyed
methods from the await dictionary proposal, which take an object of promises
and resolve to an object of results with the same keys.
Firefox now supports the WebAssembly Compact Import Section proposal, which
can reduce the size of WebAssembly modules with many imports.
Firefox now supports the WebAssembly Wide Arithmetic proposal, which adds
128-bit arithmetic instructions for better performance in cryptography and
arbitrary-precision math.
Firefox now supports QUIC version 2 (RFC 9369) for HTTP/3 connections, and
uses it when the server selects it through compatible version negotiation
(RFC 9368).
https://www.rfc-editor.org/rfc/rfc9369.html
https://www.rfc-editor.org/rfc/rfc9368.html
Support for the non-standard ::-webkit-scrollbar pseudo-element, added in
Firefox 153, is now limited to a small list of sites rather than applying
universally.
SVG <a> elements now expose the same URL properties as HTML links,
including protocol, host, pathname, and search.
https://mzl.la/3Uk8Xt0
SVGGraphicsElement.getBBox() now honors its options argument, so bounding
boxes can include stroke, markers, and clipping.
https://developer.mozilla.org/docs/Web/API/SVGGraphicsElement/getBBox#options
The font-width property is now supported as the standard name for
font-stretch.
A dynamic import() that fails due to a network or HTTP error is no longer
cached as a failure in the module map, so retrying the same specifier can now
succeed.
WebTransport now supports send groups (createSendGroup()) for controlling
how bandwidth is shared between streams, writable datagram streams
(createWritable()), and exportKeyingMaterial() for deriving keys bound to the
TLS session. It also adds a draining promise and subprotocol negotiation
through the constructor's protocols option and the protocol property.
Firefox now supports RTCError for data channel failures,
RTCSctpTransport.maxChannels, two-byte RTP header extension IDs, and more
accurate RTCTransportStats, improving WebRTC interoperability.
Unresolved︰
For users with vertical tabs enabled, the sidebar may not persist across
Firefox restarts. Vertical tabs can be re-enabled after the restart by
clicking the sidebar toolbar button. A fix is currently in development. (Bug
2065431)
https://bugzilla.mozilla.org/show_bug.cgi?id=2065431
Some sites may load slowly or fail to load on networks that block UDP. This
can affect e.g. corporate networks where a proxy or firewall blocks QUIC as
part of TLS inspection. To work around it, set
network.http.happy_eyeballs_enabled to false with the Preferences policy. A
fix is planned for the 155.0.1 release shipping no later than 8-September.
(Bug 2063452)
https://bugzilla.mozilla.org/show_bug.cgi?id=2063452
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