This article describes the major changes that are visible to users in Thunderbird version 52.0. Full details of all the changes can be found in the Thunderbird 60 [https://www.thunderbird.net/en-US/thunderbird/60.0beta/releasenotes/ release notes]. =End of support for windows XP and Vista= In line with the withdrawl of support for windows XP and Vista in versions of Firefox after 52, Thunderbird will also cease to support these two legacy operating systems. Thunderbird 52 will be the last version of Thunderbird available for those two operating systems. =Add-ons not marked as compatible with Thunderbird 60 by their authors will be disabled= Due to significant changes in the way add-ons are managed and run in Thunderbird which have occured since V52 was released version 60 will not automatically permit add-ons writting for pervious versions to load. On update, unless the add-on author has updated the add-on and karked it competible with thunderbird 60, add-ons will be disabled. This decision was not lightly made, however as it is expected that most add-ons that have not been updated will not function correctly. It is felt that the usr exerience of broken add-ons outweighed the convenience of automatically accepting the old add-on versions. =New menu location of add-on options= As a follow on to the add-on changes. Options for add-ons can no longer be managed from the add-on manager tab. A new add-on options menu has been created to access add-on options On the main menu bar this will be on the Tools menu. (Mac, Linux and Windows users with it turned on) [[Image:MainMenuBarOptions]] Alternatively if you use the application menu on the toolbar hovering over the add-on enty or clicking the > will display the add-ons which have options you can set. [[Image:AppmenuShowingADDOnOptions]] =Changes to date time settings= Thunderbird now has an option to specify if date and time formats used in the program should follow the operating system, or the locale of the installed version of Thunderbird. In other words, an US English Thunderbird can use, for example, German formats. [[Image:Regional settings]] =Compose window changes= ==During address entry, the matching part of the address is now shown in bold== To make it clearer why a particular address has been included in the auto fill list, the portion of the address that matches the typed text is now highlighted ==When writing a message, a delete button now allows the removal of a recipient== When you hover the mouse over the REplyTo: To: CC: and BCC: addressing labels an X button is now displayed to allow the deletion of that entry. [[Image:Demonstration of the delete button]] =address book= It is now postible to set a default list which will be selected upon opening the address books. To set the default, right click a folder and select the set as default entry from the menu displayed. [[Image:Set Default address book Windows]] =WebExtension themes are now enabled= Limited support for the Web extensions style add-ons used in Thunderbird will see the support of themes using that technology. =Calendar= ==Provide an option to display locations for events == Calendar events will now show a location as well as the event name. [[Image:Calendar:Location Display]] The option that controls this is located in the Calendar > Views tab [[Image:Location of Display location option]] ==Copying, cutting an pasting of recurring events and tasks== Like before for deleting or modifying, there's now a prompt to select whether to apply copying or cutting just to the selected occurence or the entire series of a recurring event or task. [[Image:Lightning Copy Occurrence Prompt]] If more then one local calendar or calendar subscriptions are avilable, the target calendar for pasting of calendar items can now be directly selected from a list of all writable calendars. [[Image:Lightning Paste Target Selection]] ==Provide the ability for sending/not sending meeting notifications directly== When dealing with meetings, there is - except of drag and drop operations - no longer a popup asking whether to notify the other participants about your changes. Instead, this is controlled within the respective dialogs or context menus directly. Along with this change, support for creating email invitations compatible with Outlook 2002 has been removed. ==Allow to enforce the use of email invitation for meeting for users of CalDAV calendars== Some CalDAV servers are configured to take care of inviting other users on the same calendar server when setting up a meeting. This would prevent sending email invitations to other participants from Thunderbird when setting up a meeting. For those calendars, [[Enable email invitations for CalDAV servers configured to do serverside scheduling|the use of email invitations can be enforced]] now regardless of the server configuration. ==Reminders can be dismissed even for read-only calendar== If a reminder for an event or task stored in a read-only calendar pops up, it can be dismissed now. Unlike for writable calendars, snoozing of reminders is still not possible for those calendar items. [[Image:Lightning Reminder Dialog RO]] Along with that change, the scope of the option to show missed reminders was limited to writable calendars. [[Image:Show Missed Reminders Options]] =Maildir Experimental feature= ==conversion of folders from mbox to maildir format and vice versa== In keeping with the long term goal of implementing a maildir like storage system in Thunderbird. Tools to convert existing folders to and from the maildir format are included in this release. More informarion on the maildir implementation in general can be found [[Maildir in Thunderbird|here]]. Everyone using maildir needs to be aware that it is still experimental and use may reveal further unknown bugs that result in dataloss.

This article describes the major changes that are visible to users in Thunderbird version 52.0. Full details of all the changes can be found in the Thunderbird 60 release notes.

End of support for windows XP and Vista

In line with the withdrawl of support for windows XP and Vista in versions of Firefox after 52, Thunderbird will also cease to support these two legacy operating systems. Thunderbird 52 will be the last version of Thunderbird available for those two operating systems.

Add-ons not marked as compatible with Thunderbird 60 by their authors will be disabled

Due to significant changes in the way add-ons are managed and run in Thunderbird which have occured since V52 was released version 60 will not automatically permit add-ons writting for pervious versions to load. On update, unless the add-on author has updated the add-on and karked it competible with thunderbird 60, add-ons will be disabled. This decision was not lightly made, however as it is expected that most add-ons that have not been updated will not function correctly. It is felt that the usr exerience of broken add-ons outweighed the convenience of automatically accepting the old add-on versions.

New menu location of add-on options

As a follow on to the add-on changes. Options for add-ons can no longer be managed from the add-on manager tab. A new add-on options menu has been created to access add-on options On the main menu bar this will be on the Tools menu. (Mac, Linux and Windows users with it turned on)

Alternatively if you use the application menu on the toolbar hovering over the add-on enty or clicking the > will display the add-ons which have options you can set.

Changes to date time settings

Thunderbird now has an option to specify if date and time formats used in the program should follow the operating system, or the locale of the installed version of Thunderbird. In other words, an US English Thunderbird can use, for example, German formats.

Compose window changes

During address entry, the matching part of the address is now shown in bold

To make it clearer why a particular address has been included in the auto fill list, the portion of the address that matches the typed text is now highlighted

When writing a message, a delete button now allows the removal of a recipient

When you hover the mouse over the REplyTo: To: CC: and BCC: addressing labels an X button is now displayed to allow the deletion of that entry.

address book

It is now postible to set a default list which will be selected upon opening the address books. To set the default, right click a folder and select the set as default entry from the menu displayed.

WebExtension themes are now enabled

Limited support for the Web extensions style add-ons used in Thunderbird will see the support of themes using that technology.

Calendar

Provide an option to display locations for events

Calendar events will now show a location as well as the event name.

The option that controls this is located in the Calendar > Views tab

Copying, cutting an pasting of recurring events and tasks

Like before for deleting or modifying, there's now a prompt to select whether to apply copying or cutting just to the selected occurence or the entire series of a recurring event or task.

If more then one local calendar or calendar subscriptions are avilable, the target calendar for pasting of calendar items can now be directly selected from a list of all writable calendars.

Provide the ability for sending/not sending meeting notifications directly

When dealing with meetings, there is - except of drag and drop operations - no longer a popup asking whether to notify the other participants about your changes. Instead, this is controlled within the respective dialogs or context menus directly.

Along with this change, support for creating email invitations compatible with Outlook 2002 has been removed.

Allow to enforce the use of email invitation for meeting for users of CalDAV calendars

Some CalDAV servers are configured to take care of inviting other users on the same calendar server when setting up a meeting. This would prevent sending email invitations to other participants from Thunderbird when setting up a meeting. For those calendars, the use of email invitations can be enforced now regardless of the server configuration.

Reminders can be dismissed even for read-only calendar

If a reminder for an event or task stored in a read-only calendar pops up, it can be dismissed now. Unlike for writable calendars, snoozing of reminders is still not possible for those calendar items.

Along with that change, the scope of the option to show missed reminders was limited to writable calendars.

Maildir Experimental feature

conversion of folders from mbox to maildir format and vice versa

In keeping with the long term goal of implementing a maildir like storage system in Thunderbird. Tools to convert existing folders to and from the maildir format are included in this release. More informarion on the maildir implementation in general can be found here. Everyone using maildir needs to be aware that it is still experimental and use may reveal further unknown bugs that result in dataloss.