2. business software
  3. news
  4. reviews
  5. top apps
Download Thunderbird 65.0 Beta 1 Email Client for PC Windows

Thunderbird 65.0 Beta 1

By Mozilla Organization  (Open Source)
User Rating

Mozilla Thunderbird makes e-mailing safer, faster, and easier with features such as intelligent spam filters, a built-in RSS reader, and quick search. Thunderbird was designed to prevent viruses and to stop junk mail.

Thunderbird includes tabbed e-mail, new search tools and indexing, smart folders, support for Firefox, a simplified setup wizard and robust junk protections that include phishing and spam filters.

Key Features Include:

  • Tabbed email.
  • An Archive feature similar to the one found in GMail.
  • Lightning fast search.
  • Smart folders.

Thunderbird has junk mail tools that have been updated to stay ahead of spam and features anti-phishing protection.

Looking for the Mac version of Thunderbird? Download Here

Title: Thunderbird 65.0 Beta 1 Email Client for PC Windows
Filename: Thunderbird Setup 65.0b1.exe
File size: 36.56MB (38,336,840 bytes)
Requirements: Windows XP / Vista / Windows 7 / XP 64-bit / Vista 64-bit / Windows 7 64-bit / Windows 8 / Windows 8 64-bit / Windows 10 / Windows 10 64-bit
Languages: Multiple languages
License: Open Source
Date added: January 2, 2019
Author: Mozilla Organization
MD5 Checksum: 86EC3310FA8D840E7AC8DEB4FF6645CB

What’s New
FileLink for WeTransfer
WebExtensions FileLink API to facilitate FileLink add-ons. WeTransfer is already included and Dropbox is available as add-on.
Various theme improvements including a dark message list/thread pane.
When multiple language packs are installed, the UI language can now be selected in the Advanced Options. Preference intl.multilingual.enabled needs to be set (and possily also extensions.langpacks.signatures.required needs to be set to false).

ADD-ON SUPPORT: Restartless add-ons continue to work if their authors have made the necessary minor adjustments. Non-restartless legacy add-ons using XUL overlays are only supported if add-on authors have adapted them. Apart from Lightning/Calendar there are a few that have been adapted, like "ThunderHTMLedit", "Compact Header" and "Signature Switch". Instaling legacy add-ons now requires a restart. Legacy add-ons can now specify an options page again.
Reply to self will now search all identities (default of preference mailnews.reply_to_self_check_all_ident changed to true).
Composition text and background colors no longer sent by default. New option in "Tools > Options, Composition".

Address book search and auto-complete slowness introduced in Thunderbird 64 beta.
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.
Decoding problems for messages with less common charsets (cp932, cp936).
 (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.
Editing a plaint text draft displayed the entire message as quote (in blue).
New messages in the drafts folder (and other special or virtual folders) will no longer be included in the new messages notification.
Edit > Undo didn't undo moving or deleting of messages.
Improvements of SMTP 5.7.1 message.

Known Issues
Account creation sometimes shows an error: "Programming bug. Assertion failed, see log". Workaround: Click "Advanced config" button.
Due to changes in the Mozilla platform profiles stored on Windows network shares addressed via drive letters are now addressed via UNC.
Spellcheck marks disappeared erroneously for words with an apostrophe (working in Thunderbird ESR).
Calendar: A localized version of Provider for Google Calendar not available at addons.thunderbird.net or the Mozilla FTP server. A US-English version can be downloaded here.
Chat: Twitter not working due to API changes at Twitter.com
Chat: Participants not sorted.