Log Message:
Update to 2.49.1

Changelog:
Based on Firefox 52.4.1

SeaMonkey-specific changes
    SeaMonkey should no longer crash when you start it or try to use the mail \ 
feature on OS X 10.12 or greater.
    You were not always prompted for authentication in SeaMonkey 2.48 under \ 
certain scenarios resulting in login failures. The problem, tracked in bug \ 
1347857, has been fixed.
    Mail and News: The way images are included in a compose window has changed. \ 
Images are now included as data URIs and not as references to parts of other \ 
messages or operating system files. This allows better interoperability with \ 
office packages such as MS Office or LibreOffice. Images linked from locations \ 
on the internet will no longer be downloaded and attached to the message \ 
automatically. This can be changed globally by setting the preference \ 
mail.compose.attach_http_images.
    Language support for nb-NO has been re-added.
    SeaMonkey now uses gtk3 on Linux. If you experience a problem because of \ 
this please file a bug and link it to Switch Linux builds to GTK3 with SeaMonkey \ 
2.49. Pleae try another OS theme first. Some of them are buggy and cause \ 
problems with SeaMonkey, Thunderbird and Firefox.
    Quotes are now colored differently in Mails bug 1374708.
    Under OSX the left panes in Bookmarks Manager, MailNews and Address Book are \ 
now styled like finder panes. See bug 1095904.
    Quotes are now colored differently in Mails up to 5 levels deep depending on \ 
your OS. See bug 1374708. This may break custom themes for email composition \ 
because a new style sheet named "messageQuotes.css" has been added.