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
Changed Calendar: Default values for the first day of the week and working days are now derived from the selected datetime formatting locale (restart after changing locale in the OS required). ; Calendar: Switch to a Photon-style icon set for all platforms. ;
Fixed Multiple requests for master password when Google Mail or Calendar OAuth2 is enabled. Scrollbar of the address entry auto-complete popup does not work. ; Security info dialog in compose window does not show certificate status. ; Links in the Add-on Manager's search results and theme browsing tabs open in external browser. ; Localized versions of Thunderbird didn't show a localized name for the "Drafts" and "Sent" folders for certain IMAP providers (particularly in France). ; Replying to a message with an empty subject inserted Re: twice (not working in Thunderbird 60.0). Spellcheck marks disappeared erroneously for words with an apostrophe (not working in Thunderbird 60.0). ; Calendar: First day of the week cannot be set. ; Calendar: Several fixes related to cutting/deleting of events and email scheduling. ; Various security. ;
Known Issues Unresolved Thunderbird will hang if HTML signature references non-existent image (solution forthcoming). ; Chat: Twitter not working due to API changes at Twitter.com (solution forthcoming).
October 10, 2018 
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