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相信很多朋友都正在使用或者曾经使用过Firefox（火狐）浏览器，毕竟对于这么一个具有传奇色彩的软件自然是要尝试一下的。不过一直以来，Firefox有着一个致命的缺点，那就是冷启动速度太慢，有的时候完成第一次启动甚至需要耗费将近1分钟的时间，这么一个看似小的缺陷却已经严重影响了那些首次尝试Firefox的用户热情，一些用户甚至因为无法忍受这一点而转投Chrome阵营。那么如果你也在被这个问题所困扰的话，我们建议你来使用一下“火狐”的同胞兄弟：“苍月”。

所谓“苍月”指的是Pale Moon，是一个基于Firefox浏览器修改优化而来的衍生版本，在Pale Moon项目的官方主页上，项目组人员详细的描述了Pale Moon相比于Firefox原版的修改内容，涉及针对各种处理器的特殊优化，以及对于内部脚本代码的修改和调整，官方表示，Pale Moon修改版相比于原版Firefox，会有25%的速度提升。

和其他修改版本不同，Pale Moon的修改内容都仅仅与性能有关，非性能提升内容并不会进行修改，如果你习惯了某些Firefox扩展，那么在Pale Moon中也可以进行安装。

经过简单的试用后，笔者深刻感受到了Pale Moon浏览器相比于Firefox的性能提升，冷启动时间有了大幅度缩短，并且整体浏览器响应速度非常的迅速。当然，关于速度方面的提升，用语言和图片是不足以描述的，具体有多快，我们还是建议大家下载试用一下。快与不快，一用便知。

v34.0.0 (2026-01-20)
This is a new milestone release! There are many changes in this milestone; the most important ones are highlighted here.

New features:
Our default theme on Windows received a refresh and update. It should integrate better with Windows 11 now, and be more responsive to dark accent colors, among other things.
Implemented WeakRef. See implementation notes.
Implemented URL.canParse().
Implemented the inset-block and inset-inline CSS shorthands.
Added a preference (privacy.forgetaboutsite.clearPasswords) to control clearing of passwords when using “forget about this site” in the permissions manager, and disabled clearing of passwords by default, since it was considered unexpected behavior by the community.
Changed our JavaScript PRNG to Xoroshiro128++ to make it more robust while keeping high performance.

Important updates and fixes:
Re-landed CSS Cascade Layers support after the previous back-out.
Re-landed CSS color-mix support after the previous back-out. RGB and HSL color spaces only, like previous.
Implemented viewport overflow propagation logic. See implementation notes.
Unprefixed CSS -moz-appearance; Pale Moon now accepts the unprefixed CSS appearance keyword. For compatibility, -moz-appearance and -webkit-appearance (if enabled) have been retained, although the long-term plan is to eventually remove the -moz prefixed one, so if you are an extension or theme developer, please consider switching your CSS to use appearance without a prefix.
Fixed an intermittent but fairly prominent crash-to-desktop due to JavaScript garbage collection on certain modern sites.
Fixed a crash on sites with certain types of CSP handling.
Fixed a crash in WASM.
Updated NSS to 3.90.9 (custom) to pick up several security and stability fixes.
Updated ICU to v78.1. This is a major uplift for our internationalization subsystem, allowing further future developments for the Internationalization API.
Updated Emoji support to Unicode 17.
Updated our expat parser code to a more recent version (2.7.3), fixing various issues.
Improved handling and rendering of emoji clusters.

Other changes:
Added support for building on Sparc64 hardware.
Added support for building for NetBSD on Alpha.
Added basic support for building on Mac PowerPC (still a work in progress).
Added basic support for building on LoongArch64 hardware (龍芯 CPUs).
Added support for running on FreeBSD 15.
Removed automatic coloring of auto-filled login fields as it would interfere with various browser and system color schemes.
If preferred, this can be reinstated by users with a userContent.css document or e.g. the Stylem extension by leveraging the :autofill CSS pseudo-class.
Restored support for in-process NPAPI plugins, allowing plugin use on systems where out-of-process is undesirable.
Improved JavaScript IonMonkey stability on ARM and Mac SoC hardware.
Linux GTK builds now always build with gio, and gconf support has been removed.
Security issues addressed: CVE-2025-13015, CVE-2026-0879 (DiD), CVE-2026-0880 (DiD), CVE-2026-0889 (DiD), CVE-2026-0883, CVE-2026-0886 (DiD), and several others without a CVE designation.

Implementation notes:
This milestone implements WeakRef in the platform in 2 modes, controlled by a new preference javascript.options.weakrefs. In the default mode (false), WeakRef does not allow page content to reach into the JavaScript engine to coerce garbage collection, while still offering the front-end API to web content (effectively creating a stub). The other mode (true) allows this coersion and gives potentially malicious web scripting some* control over the JavaScript garbage collector. It is not recommended to set this to true for general use. Only enable this if your situation is running trusted code and explicitly requires nudging the JavaScript engine to dereference objects. We resisted having this strongly discouraged and potentially dangerous API at all, but some sites started to use WeakRef unconditionally and breaking without the API front-end, so this compromise was implemented, leaving control in the hands of the user.
* The spec only allows for code to hint/coerce and does not guarantee if or when dereferencing happens.
A number of sites (including some top Internet sites) have started using overflow-x: clip without overflow-y on full-document elements (document root/ or ). While doing this makes little to no logical sense, our strict implementation of clip (since 33.9.0, also see the implementation notes there) would, as a result, create unscrollable pages.There is some special logic for this (viewport overflow propagation) described in the relevant drafts which we have now implemented, updating our overflow: clip implementation to avoid the previously problematic strict behaviour in these particular cases.

Pale Moon 34.0