Дополнения

ThunderPlunger от David White

Sorry but this addon is no longer supported in TB 60. See below.

This add-on provides a few new ways to keep Thunderbird clean.

accountex от Michael Otto

Export/Import Account Settings.....

ToneQuilla от R Kent James, Realraven (Axel Grude)

Adds a new action to mail filters to allow playing a particular sound when the filter matches. Also includes several sample sound files.

For Thunderbird 78 support of sounds, please check out Filtaquilla 3.1

FolderFlags от Ryan Lee

Allows users to edit the flags Thunderbird sets on folders.

JunQuilla от R Kent James, Christopher Leidigh

1) adds column with percent likelihood that a message is spam, 2) extends junk status column to show why a message was classified as junk/good, 3) adds an Uncertain folder for messages needing user decision.

New Tab Button от H.Ogi

It provide you the following functionalities:
* Open a selected message in a tab by a toolbar button
* Open a message in a tab by double-clicking its header view (disabled by default)
* Hide Lightning's Today Pane on opening a tab

Maximize Message Pane от H.Ogi

Maximize message pane by collapsing the thread pane. You can read a message in larger area without opening a new message window...

Show InOut от Günter Gersdorf

Adds some columns to the tableview. One shows an indicator wether a mail is incoming or outgoing, other shows the sender, the recipient(s) or the correspondent(s). Columns can be shown as name only, address only or both.

Slideshow от Leszek Życzkowski, pastisman

Просмотр вложенных в письмо изображений
When email has attached pictures, it displays "View as Slideshow" button next to the attachment. Button click pops a slideshow window with all the images, allowing you to zoom in/out, save...

Get Selected Mails от TrVTrV

Gets new messages for selected mail accounts.

Phoenity Buttons от Dillinger

Adds some toolbar buttons using phoenity icons.

Sender Name от Takahiro Shinagawa

SmartTemplate от gaby_hy

This Add-on provides the smart and simple templates and abilities to customize the quote header flexibly.
Templates can be inserted automatically at the new/repling/forwarding message. A different template can be used respectively per account.

Folder Account от Christopher Eykamp, welpy-cw

Lets you associate user accounts and identities with specific folders. Great for multiple users who share TB, or for managing mailing lists.

AddressBookTab от pastisman

It adds a button that can be put in toolbars and that open the addressbook in a new tab