This update for MozillaThunderbird to version 60.5.1 fixes the following issues:

Security vulnerabilities addressed (MFSA 2019-03 MFSA 2018-31 bsc#1122983 and MFSA 2019-06 bsc#1125330):

- CVE-2018-18356: Fixed a Use-after-free in Skia.
- CVE-2019-5785: Fixed an Integer overflow in Skia.
- CVE-2018-18335: Fixed a Buffer overflow in Skia by default deactivating Canvas 2D.
  This issue does not affect Linuc distributions.
- CVE-2018-18509: Fixed a flaw which during verification of certain S/MIME signatures
  showing mistekenly that emails bring a valid sugnature. 
- CVE-2018-18500: Use-after-free parsing HTML5 stream
- CVE-2018-18505: Privilege escalation through IPC channel messages
- CVE-2016-5824: DoS (use-after-free) via a crafted ics file
- CVE-2018-18501: Memory safety bugs fixed in Firefox 65 and Firefox ESR 60.5
- CVE-2018-17466: Buffer overflow and out-of-bounds read in ANGLE library with
  TextureStorage11
- CVE-2018-18492: Use-after-free with select element
- CVE-2018-18493: Buffer overflow in accelerated 2D canvas with Skia
- CVE-2018-18494: Same-origin policy violation using location attribute and
  performance.getEntries to steal cross-origin URLs
- CVE-2018-18498: Integer overflow when calculating buffer sizes for images
- CVE-2018-12405: Memory safety bugs

Other bug fixes and changes:

* FileLink provider WeTransfer to upload large attachments
* Thunderbird now allows the addition of OpenSearch search engines
  from a local XML file using a minimal user inferface: [+] button
  to select a file an add, [-] to remove.
* More search engines: Google and DuckDuckGo available by default
  in some locales
* During account creation, Thunderbird will now detect servers
  using the Microsoft Exchange protocol. It will offer the
  installation of a 3rd party add-on (Owl) which supports that
  protocol.
* Thunderbird now compatible with other WebExtension-based
  FileLink add-ons like the Dropbox add-on
* New WebExtensions FileLink API to facilitate add-ons
* Fix decoding problems for messages with less common charsets
  (cp932, cp936)
* New messages in the drafts folder (and other special or virtual
  folders) will no longer be included in the new messages
  notification
* Thunderbird 60 will migrate security databases (key3.db, cert8.db
  to key4.db, cert9.db). Thunderbird 60.3.2 and earlier contained a
  fault that potentially deleted saved passwords and private certificate
  keys for users using a master password. Version 60.3.3 will prevent
  the loss of data; affected users who have already upgraded to version
  60.3.2 or earlier can restore the deleted key3.db file from backup
  to complete the migration.
* Address book search and auto-complete slowness introduced in
  Thunderbird 60.3.2
* Plain text markup with * for bold, / for italics, _ for underline
  and | for code did not work when the enclosed text contained
  non-ASCII characters
* While composing a message, a link not removed when link location
  was removed in the link properties panel
* Encoding problems when exporting address books or messages using
  the system charset. Messages are now always exported using the
  UTF-8 encoding
* If the "Date" header of a message was invalid, Jan 1970 or Dec 1969
  was displayed. Now using date from "Received" header instead.
* Body search/filtering didn't reliably ignore content of tags
* Inappropriate warning "Thunderbird prevented the site
  (addons.thunderbird.net) from asking you to install software on
  your computer" when installing add-ons
* Incorrect display of correspondents column since own email
  address was not always detected
* Spurious 
 (encoded newline) inserted into drafts and sent email
* Double-clicking on a word in the Write window sometimes
  launched the Advanced Property Editor or Link Properties dialog
* Fixe Cookie removal
* "Download rest of message" was not working if global inbox was
  used
* Fix Encoding problems for users (especially in Poland) when a
  file was sent via a folder using "Sent to > Mail recipient"
  due to a problem in the Thunderbird MAPI interface
* According to RFC 4616 and RFC 5721, passwords containing
  non-ASCII characters are encoded using UTF-8 which can lead to
  problems with non-compliant providers, for example
  office365.com. The SMTP LOGIN and POP3 USER/PASS
  authentication methods are now using a Latin-1 encoding again
  to work around this issue
* Fix shutdown crash/hang after entering an empty IMAP password