Web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing made simple.
SeaMonkey is available in 26 languages, for Windows, Mac OS X and Linux.
Most notably, this release features for the first time:
- The Content Security Policy (CSP) 1.0 parser has been enabled.
- The Mixed Content Blocker has been enabled, blocking insecure active content loads on HTTPS pages.
- New mail alert information can be customized now (Preferences/Mail & Newsgroups/Notifications).
- A confirmation prompt has been introduced to protect against accidental permanent data loss when force-deleting messages using Shift+Del.
- MailNews Save As Template supports multiple selections now.
- The size on disk is now shown for newsgroup folders.
- Added support for scrollbar style in Mac OS X 10.7 and newer.
- Enabled mixed content blocking to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages.
- Improved about:memory's functional UI.
- Enabled DXVA2 on Windows Vista+ to accelerate H.264 video decoding.
- Simplified interface for notifications of plugin installation.
- Enabled users to switch the search provider across the entire browser.
- CSP policies using the standard syntax and semantics will now be enforced.
- Implemented the HTML5 form control.
- Added unprefixed requestAnimationFrame.
- Dropped blink effect from CSS rule text-decoration:blink and completely removed
- Fixed several stability issues.
Release notes for SeaMonkey 2.23:
- SeaMonkey-specific changes
- Download progress is now shown in the Mac OS X app dock icon.
- EXIF orientation is now being used when displaying attached images in MailNews.
- "This folder is being processed... to get messages." alerts on active MailNews folders now identify the account or folder.
- MailNews notifications have a new look.
- See the changes page for a more complete overview.
- Mozilla platform changes
- All plugins, with the exception of recent Flash plugins, now default to click-to-play.
- The password manager now supports script-generated password fields.
- Support for H.264 on Linux is now available if the appropriate GStreamer plugins are installed.
- Support for MP3 decoding on Windows XP has been added, completing MP3 support across Windows OS versions.
- The CSP implementation now supports multiple policies, including the case of both an enforced and Report-Only policy, per the spec.
- There is no longer a prompt when websites use appcache.
- Support for the CSS image orientation property has been added.
- IndexedDB can now be used as an "optimistic" storage area so it does not require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage.
- When displaying a standalone images, the EXIF orientation information contained within the JPEG image is now matched (bug 298619).
- Page load times have been improved due to no longer decoding images that are not visible (bug 847223).
- Support for the AudioToolbox MP3 backend has been added on Mac OS X (bug 914479).
- Fixed several stability issues.
For a more complete list of major changes in SeaMonkey 2.20, see the What's New section of the Release Notes, which also contain a list of known issues and answers to frequently asked questions.
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