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Auto Resize Image Requires Restart

Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).

Rated 4 out of 5 stars (62)
182 users

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Firesizer Requires Restart

Allows you to resize the window to specific dimensions.

NOTE: Users of Firefox 29 and above must install "The Addon Bar" extension to use this, as Firesizer uses the add-on bar that has been removed in Firefox 29.

Rated 4 out of 5 stars (127)
5 users

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Window Master

Functionality for multiple screens and windows. Easily open links in other windows or on other screens, move or merge tabs, and move or merge entire windows. With graphical controls for grid positioning.

Rated 4 out of 5 stars (23)
0 users

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Auto Resize JPEG Requires Restart

Resizer for inline and attachment images (only JPEG format).
For Windows only.

Rated 3 out of 5 stars (35)
1 user

Download for Windows

ResizeTbWidth

Resize Thunderbird window width.
Set window with three widths (1/1 (1920px), 1/2 (960px), 1/3 (640px)).

July 3rd 2021.

I love God.

Sungho.

Not yet rated
69 users

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Inline Image Resizer

This AddOn allows you to quickly resize images (like screenshots) you embed in a new mail to small, medium or large size with just a click in the composer window. This reduces e-mail size. The AddOn also estimates the size of your mail.

Not yet rated
483 users

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