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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。

v28.4.0 (2019-02-19)
This is a major development, stability and security release.

Changes/fixes:

Removed more telemetry code from the platform.
Fixed implementation of the IntersectionObserver API to avoid crashes, and enabled it by default.
Switched to the new ffmpeg decode API to avoid dropping of frames.
Fixed a buffering issue in the WebP decoder that caused intermittent browser crashes.
Improved resource-efficiency for internal stopwatch timers.
Improved handling of incorrectly-encoded CTTS in media files, resolving some playback issues of videos.
Improved the Cycle Collector and Garbage Collector.
Improved fullscreen navigation bar handling in the situation it has focus when switching to full screen.
Aligned instanceof with the final ES6 spec.
Improved Windows DIB (bitmap) clipboard data handling.
Exposed TLS 1.3 cipher suite prefs in about:config in case people want to disable them individually.
Allowed empty string on the location.search setter to clear URL query parameters from JS.
Added a potential fix for external links not opening in the current window/tab (untested).
Enabled C++11 thread-safe statics in the entire application.
Updated several preferences for integration with the new add-ons site.

Security fixes:

Fixed a potential use-after-free in IndexedDB code. (DiD)
Improved proxy handling to avoid localhost getting proxied. (CVE-2018-18506)
Ported upstream Skia fixes. (CVE-2018-18356, CVE-2018-18335)
Fixed an additional Skia issue. (CVE-2019-5785)
Fixed several potentially-exploitable memory safety hazards and crashes. (DiD)
Fixed a possible data race when performing compacting GC.

DiD This means that the fix is “Defense-in-Depth”: It is a fix that does not apply to a (potentially) actively exploitable vulnerability in Pale Moon, but prevents future vulnerabilities caused by the same code, e.g. when surrounding code changes, exposing the problem, or when new attack vectors are discovered.

Pale Moon 28.4.0