SeaMonkey 2.53.9

SeaMonkey

The SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet application suite. Such a software suite was previously made popular by Netscape and Mozilla, and the SeaMonkey project continues to develop and deliver high-quality updates to this concept. Containing an Internet browser, email & newsgroup client with an included web feed reader, HTML editor, IRC chat and web development tools, SeaMonkey is sure to appeal to advanced users, web developers and corporate users.

Under the hood, SeaMonkey uses much of the same Mozilla source code which powers such successful siblings as Firefox, Thunderbird, Camino, Sunbird and Miro. Legal backing is provided by the Mozilla Foundation.

What's New in SeaMonkey 2.53.9

SeaMonkey 2.53.9 contains (among other changes) the following major changes relative to SeaMonkey 2.53.8.1:

There is now an option to clear browser history during shutdown bug 1621445.
Uninstall plugin command for ChatZilla bug 541719.
Update icons used in ChatZilla status bar bug 1710238 and bug 1710249.
Make ChatZilla understand mIRC color code 99 bug 1710298.
Implement IRCv3 basic CAP negotiation bug 1717539 and CAP LIST and update CAP ACK and CAP LS bug 1710313.
Use Unicode instead of images for emojis in ChatZilla bug 1711375 and add some extra emojis bug 1711376.
Use SeaMonkey's configured web search rather than a separate one in ChatZilla bug 1712498.
Add a networks editor to ChatZilla bug 1716232.
Implement IRCv3 away-notify bug 1717543, chghost and userhost-in-names bug 1717544, self-messaging bug 1722212 and WHOX bug 1722214.
Link to SeaMonkey website in debugQA for verification sites and development section bug 1685606.
Send button should be disable until we have a recipient bug 104973.
Remove need to use a modifier for marking messages as unread bug 1719216.

SeaMonkey 2.53.9 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:

The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".