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Theme Font & Size Changer for ThunderBird

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 3 out of 5 stars (100)
187 users

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Expression Search / GMailUI Requires Restart

Powerful message searching through expressions. Type "from:fred to:tom" to see all messages from Fred to Tom in the current view. Support 'regular expressions' and 'click to search'.

Rated 4 out of 5 stars (125)
227 users

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Disable DragAndDrop (Thunderbird) Requires Restart

A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.

Rated 5 out of 5 stars (19)
77 users

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Silent Block

Minimum and fast URL blocker.

Rated 4 out of 5 stars (31)
104 users

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Auto Filter Timer Requires Restart

Run existing message filters on any folder at a specified interval. Simply right-click the desired folder then choose from the [AUTOFILT] menu items. This is a hack/clean-up of another coder's work, but works perfectly. Use at your own risk

Rated 4 out of 5 stars (2)
16 users

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ExtendIMAPFilters

This addon extends filtering to read messages downloaded during an IMAP synchronization (bug 308148)

Rated 5 out of 5 stars (3)
8 users

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SavedSearchThemAll Requires Restart

A Thunderbird extension to automagically extend all the saved searches to all the foders!

Rated 4 out of 5 stars (2)
20 users

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IMAP Draft Unread Requires Restart

This is a Thunderbird addon that lets you customize the behavior of the IMAP draft unread messages. No more new mail notifications for your drafts!!

Rated 3 out of 5 stars (1)
17 users

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Reply Monitor Requires Restart

**This is NOT COMPATIBLE with Thunderbird 31 or newer versions**
Keep track of your emails and replies (Lightning is required).
Note: the name of this add-on has been changed to Reply Monitor because the previous name is a registered trademark.

Rated 4 out of 5 stars (21)
1 user

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Mark Junk Read

Automatically marks all messages in junk folders as read.

Rated 5 out of 5 stars (9)
20 users

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Gravatars Requires Restart

Show a column with the Gravatar-picture and sender-name in email folders.

Rated 4 out of 5 stars (2)
3 users

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Delete Only Empty Folder Requires Restart

Disallows to delete not-empty mail folders.

Rated 5 out of 5 stars (1)
1 user

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Copy Folder mod Requires Restart

I corresponded to thunderbird 60 or later
Copy Folder

original:
https://addons.thunderbird.net/ja/thunderbird/addon/copy-folder/

Rated 4 out of 5 stars (10)
495 users

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YNote Requires Restart

Make some text notable on the each folder in folder's property dialog box.

Rated 5 out of 5 stars (1)
2 users

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