SeaMonkey 2.53.2 (64-bit)

What's new in this version:

- Scrollbars have been switched over to the native gtk3 theme. If your theme does not show scrollbar buttons and you would like to see them try editing ~/.config/gtk-3.0/gtk.css and adding the following:

* {
-GtkScrollbar-has-backward-stepper: 1;
-GtkScrollbar-has-forward-stepper: 1;
}

- The download progress dialog has been fixed and is now showing the correct status for downloads. Some downloads may not show the transferred count. This problem is under investigation
- SeaMonkey is now translated and available in Finnish and Georgian
- Because of website compatibility issues and privacy concerns the Lightning version is no longer appended to the user agent string and has been removed from the preferences dialog
- Advanced Layers has been activated on Windows. This should boost performance on some websites. If you experience graphics problems please disable it by setting the pref "layers.mlgpu.enabled" to false
- Whether the native app chooser is used in Linux is now controlled via a preference setting in the Helper Applications preference pane
- In the Modern theme, popup notifications have improved styling and column headers now display sort direction arrows
- The column picker and folder view have been reinstated for the bookmarks panel
- Introduced the ability to close all tabs to the right of the current tab
- Whether mailnews tabs open in the background is controlled by a separate preference to browser tabs via General Settings section of main Mail & Newsgroups preference pane
- Fixed an issue with the recipient being missing when using Reply to Sender and Group button in Newsgroup discussions
- SeaMonkey now prevents address books from having duplicate names
- 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
- The only NPAPI plugin which will work with SeaMonkey 2.53.2 is Flash. Support for other NPAPI plugins like Java and Silverlight has been removed
- 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".