Pale Moon: Release notes

27.0.2 (2016-12-02)

This is a minor update to address usability and security issues:
  • Enabled Firefox Compatibility mode by default for the useragent string.
    Unfortunately too many websites (and especially the big players who should know better like Google, Apple and Microsoft) still require the "we must pretend to be Firefox if we want this site to work" status quo to be maintained, because people still insist on using useragent sniffing to determine "browser features", or even worse, discriminate against free choice of browser by flat-out refusing service (I'm looking at you, banking industry and cloud services!) when visiting websites just because companies don't want to provide assistance to any but users on the main 3.
    HTML offers plenty of ways to do proper feature detection; site owners should use them.
    Seriously people, it was a bad idea 20 years ago, and it's a worse idea in 2016.
  • The built-in devtools are back, and with a facelift!
    Thanks to some consistent community help, the built-in devtools, sorely missed by a number of our users, are back. They've received a code and style update and should be fully functional on the new platform. This was originally planned for 27.1, but it was decided to include this as soon as possible, not in the least to assist extension developers in their efforts to adapt to Pale Moon 27.
  • Security fix:
    Fixed a crash in SVG, related to CVE-2016-9079, as a defense-in-depth measure.

27.0.1 (2016-11-28)

This is a bugfix release for some of the issues that popped up with the new milestone.

Changes/fixes:
  • Fixed removal of distribution/bundles/ copies of status bar code and ruby annotations code.
    This should clean up everything on install/upgrade that currently causes double code to create intermittent/odd behavior.
  • Backed out some media back-end changes to fix MSE playback on Twitch.tv and other similar sites.
  • Disabled pop-up network status in full screen by default (since video detection is rather iffy at the moment).
  • Fixed a regression causing the "reset profile" button to not appear in about:support on the default profile.
  • Worked around bad Netflix interface changes - it will now use a more compatible web UI.
    Please note that these Netflix changes were unrelated to the actual release of Pale Moon (26.5 is also affected).
  • Aligned base status bar colors with default prefs.
  • Fixed status bar options not being remembered.
  • Added an override for Amazon Prime videos so they won't stop us at the front door any longer when not using the Firefox Compatibility user agent mode.
  • Re-applied proper branding text to in-app licensing.

27.0.0 (2016-11-22)

After about 8 months of development, we now have a new milestone release with literally too many changes to list even concisely. These release notes will therefore only highlight the most important parts of this release.
In this release we've done a full upgrade of our back-end platform, meaning many things work different "under the hood" and you may run into a number of extension compatibility issues as a result.

New and updated features:
  • Support for DirectX 11 and Direct2d 1.1 on Windows. This will bring Pale Moon more in line with the capabilities for current-day operating systems and graphics hardware.
  • Update of the Goanna engine to 3.0 - with many changes to layout and rendering for the modern web.
  • Pale Moon now fully supports HTTP/2.
  • Ruby Annotations are now an integral part of the HTML parser, controllable with CSS.
  • Media Source Extensions have been implemented to solve many video playback issues.
    This can be enabled/disabled and configured in Options. It's recommended at this time to not enable MSE for WebM since there are a few issues with it on services like YouTube (e.g. losing audio when looping/skipping).
  • Support for reading and playing so-called "fragmented" MP4 files has been added, further solving media playback issues.
  • Support for SSL/TLS connections to proxy servers.
  • Support for the WOFF2 font format for downloadable fonts.
  • The JavaScript engine has been updated with support for many landmark ECMAScript6 features (chief among them promises and generators). This will solve many of the web compatibility issues that people have started to run into in the past few months (e.g. webmail interfaces, some sites coming up blank because they are script-generated).
  • The way web content is cached has been changed to be more efficient. If you want to immediately take advantage of this, clear your cache.
Removed support/features:
  • Removed support for Windows XP. If you are still running Windows XP, then your only option is to continue using Pale Moon 26.
  • Removed the internal PDF (pre)viewer. This module was not maintained, was unable to display even half of the PDF documents correctly, and could not reasonably remain included in the browser. Please use a separate reader and/or install a PDF reader plugin.
  • Disabled building of the devtools. They will not be included in release versions of Pale Moon from this point forward. If you are a web developer or otherwise need those tools, fear not! They are available as a browser extension.
  • Removed the active XSS filter. This feature, although effective, was prone to some instability and needs to be rewritten for the update of our platform. It may or may not return in the future, depending on whether the original author has time to rewrite parts of this filter implementation.
  • Removed support for Add-on SDK extensions (JetPack extensions), considering the Mozilla/Gecko SDK is no longer compatible with our combination of application and platform code.
Security highlights:
  • All relevant security fixes up to and including Firefox 50 have been ported across from Mozilla to continue to provide an as secure as possible browser.
  • Several libraries have been updated to their latest versions to pick up any important vulnerability fixes.
  • There's a new option and control to determine whether to save zone information (marking files as "downloaded from the Internet") on downloaded files (Windows+NTFS). You can find this in Options.
Other important notes:
  • When first upgrading your browser to v27, your profile will be migrated to the new format for the browser. This is a one-time conversion and unfortunately this migration can cause some issues. Please see the forum FAQ for more details.
  • Pale Moon 27 will initially only be available in English. We are working on getting localization done to have language packs available over time.
    Important: You can not use the previous language packs since many strings have changed. Trying to do so will likely prevent the browser from starting or functioning. Pale Moon will automatically disable language packs for the previous version, but if you have explicitly disabled add-on compatibility checking you may run into trouble.
  • We will continue to fully support the following:
    • NPAPI plugins
    • Extensions with binary/XPCOM components
    • XUL/Overlay and bootstrapped extensions
    • Complete themes
    • Unsigned and author-signed extensions
    • The Camellia encryption cipher (also in GCM mode)
    • Graphite font shaping
    • Sync 1.1 (albeit without support for syncing add-ons)
    • Full customization of the UI as before


Release notes for previous versions (unsupported)

You can find the release notes for previous releases of Pale Moon on the Archived Versions Release Notes page.

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