This update for MozillaThunderbird and mozilla-nspr fixes the following issues:

- Mozilla Thunderbird 78.4
* new: MailExtensions: browser.tabs.sendMessage API added
* new: MailExtensions: messageDisplayScripts API added
* changed: Yahoo and AOL mail users using password authentication will be migrated to OAuth2
* changed: MailExtensions: messageDisplay APIs extended to support multiple selected messages
* changed: MailExtensions: compose.begin functions now support creating a message with attachments
* fixed: Thunderbird could freeze when updating global search index
* fixed: Multiple issues with handling of self-signed SSL certificates addressed
* fixed: Recipient address fields in compose window could expand to fill all available space
* fixed: Inserting emoji characters in message compose window caused unexpected behavior
* fixed: Button to restore default folder icon color was not keyboard accessible
* fixed: Various keyboard navigation fixes
* fixed: Various color-related theme fixes
* fixed: MailExtensions: Updating attachments with onBeforeSend.addListener() did not work
MFSA 2020-47 (bsc#1177977)
* CVE-2020-15969 Use-after-free in usersctp
* CVE-2020-15683 Memory safety bugs fixed in Thunderbird 78.4
- Mozilla Thunderbird 78.3.3
* OpenPGP: Improved support for encrypting with subkeys
* OpenPGP message status icons were not visible in message header pane
* Creating a new calendar event did not require an event title
- Mozilla Thunderbird 78.3.2 (bsc#1176899)
* OpenPGP: Improved support for encrypting with subkeys
* OpenPGP: Encrypted messages with international characters were sometimes displayed incorrectly
* Single-click deletion of recipient pills with middle mouse button restored
* Searching an address book list did not display results
* Dark mode, high contrast, and Windows theming fixes
- Mozilla Thunderbird 78.3.1
* fix crash in nsImapProtocol::CreateNewLineFromSocket
- Mozilla Thunderbird 78.3.0
MFSA 2020-44 (bsc#1176756)
* CVE-2020-15677 Download origin spoofing via redirect
* CVE-2020-15676 XSS when pasting attacker-controlled data into a contenteditable element
* CVE-2020-15678 When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after- free scenario
* CVE-2020-15673 Memory safety bugs fixed in Thunderbird 78.3

- update mozilla-nspr to version 4.25.1
* The macOS platform code for shared library loading was
changed to support macOS 11.
* Dependency needed for the MozillaThunderbird udpate

This update was imported from the SUSE:SLE-15:Update update project.