Appearance and Customization

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Zoom Button for Thunderbird

Zoom in, zoom out, and reset zoom with one toolbar button. Works in the Compose window too.

Rated 4 out of 5 stars (9)
2,602 users

Color Transform No Restart

Adapt page colors to your taste or need. Save your favorite color scheme for automatic coloration. Comes with 18 predefined themes and 24 basic transforms for hue, saturation, lightness and opacity. For Firefox 24.0 and above.

Rated 4 out of 5 stars (17)
2,488 users

Element Inspector No Restart

Shift-RightClick any element to open it in DOM Inspector.

Rated 5 out of 5 stars (23)
2,416 users

Menu Filter No Restart

Keep your menus in check by filtering out items you never use.

Rated 4 out of 5 stars (28)
2,274 users

Old-style smilies

Reverts the smilies in Thunderbird to those of version 2.

Rated 4 out of 5 stars (1)
2,241 users

Priority Switcher

Change priority of the received messages from the toolbar button and the context menus...

Rated 4 out of 5 stars (18)
2,212 users

New Tab Button

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

Rated 5 out of 5 stars (8)
1,984 users

Colorific. No Restart

Colorize entire web pages manually or automatically. Comes with 28 customizable themes that transform hue, saturation, lightness and opacity. For Firefox 28.0 and above. NEW: Copy themes and group color properties using drag-and-drop.

Rated 4 out of 5 stars (19)
1,665 users

More Snooze

This add allow to customize the snooze delay when snooze popup appears (lightning required).

Rated 5 out of 5 stars (5)
1,477 users

Stylish Tools

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 4 out of 5 stars (1)
1,118 users

Column Reader No Restart

Web reader for wide screens and long documents. Read with pleasure in one of many attractive layouts. NEW: Integrated image viewer with pan and zoom + Choice of replacement font. For Firefox 24.0 and newer.

Rated 5 out of 5 stars (20)
1,046 users

Enhanced Priority Display

Enhanced thread pane display of message priorities.

Rated 5 out of 5 stars (5)
1,015 users

Big Navigation No Restart

Increases the navigation links on the pages

Rated 5 out of 5 stars (4)
986 users

Menu On Top No Restart

Moves the Thunderbird menu bar to the top. Choose from a selection of visual styles.

It is convenient to have the menu on top of the tabs like Firefox; this is also a good area for placing "global" toolbar buttons like Navigation or get mail.

Rated 5 out of 5 stars (3)
860 users

Windows Taskbar Unread Badge No Restart

Put an unread mail count badge on the Thunderbird icon in the Windows taskbar.

Rated 3 out of 5 stars (11)
801 users

Search as list

Search results appear as list (as per the "Open email as list" button).
- return to facet view with shift+close [x]
- auto open list view when few results found
- column config./sort/toggle [IMG3&4]
- apply columns to search as list menu [IMG5]

Rated 5 out of 5 stars (16)
744 users

Hide C. Titlebar Plus Lite

* "Maximize your content space by configuring Title-bar & floating main-menu".
* Configurable "Thunderbird" application-main-button at top-left corner!, like Firefox's one. (see sshots)
* "Close Current Tab"! as configurable Close-button action.

Rated 5 out of 5 stars (17)
707 users

Address Widget Lines

Address Widget Lines provides the ability to select the number of address lines to display in the message compose window.

Rated 5 out of 5 stars (17)
691 users

Collapsed Unread

Shows unread email count for collapsed folders even if the unread mails are in subfolders.

Rated 3 out of 5 stars (5)
641 users

Sort and Search Customization Dialogs

Sort and search for buttons in (any) toolbar customization dialog

Rated 4 out of 5 stars (13)
517 users