Mozilla Seamonkey 2.53.19 (2.53.19b1)

SeaMonkey 2.53.19 contains (among other changes) the following changes relative to SeaMonkey 2.53.18.2:

• Cancel button in SeaMonkey bookmarking star ui not working bug 1872623.
• Remove OfflineAppCacheHelper.jsm copy from SeaMonkey and use the one in toolkit bug 1896292.
• Remove obsolete registerFactoryLocation calls from cZ bug 1870930.
• Remove needless implements='nsIDOMEventListener' and QI bug 1611010.
• Replace use of nsIStandardURL::Init bug 1864355.
• Switch SeaMonkey website from hg.mozilla.org to heptapod. bug 1870934.
• Allow view-image to open a data: URI by setting a flag on the loadinfo bug 1877001.
• Save-link-as feature should use the loading principal and context menu using nsIContentPolicy.TYPE_SAVE_AS_DOWNLOAD bug 1879726.
• Use punycode in SeaMonkey JS bug 1864287.
• Font lists in preferences are no longer grouped by font type, port asynchronous handling like Bug 1399206 bug 1437393.
• SeaMonkey broken tab after undo closed tab with invalid protocol bug 1885748.
• SeaMonkey session restore is missing the checkboxes in the Classic theme bug 1896174.
• Implement about:credits on seamonkey-project.org website bug 1898467.

The following bugs were fixed in our branch of the Gecko source code only:

• Fix for the 0.0.0.0 day vulnerability oligo summary.
• Link in update notification does not open Browser bug 1888364.
• Update ReadExtensionPrefs in Preferences.cpp bug 1890196.
• Add about:seamonkey page to SeaMonkey bug 1897801.