These are a ready make selection of some of the most popular buttons from the Custom Toolbar Button Maker

Thunderbird, Postbox

Free Memory

Free Unused Memory

Free unused memory that Firefox is currently using.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Menu

All menus

Show all the menus in a single menu.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Passwords

Open Password Manager

Opens the password manager to view saved passwords

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Source

View Page Source

View the page or message source code.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Tools Menu

Show the tools menu

Show the tools menu.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

about:plugins

Open about:plugins to view installed plugins

Open about:plugins to view installed plug-ins.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Change Dictionary

Quickly Change the Current Dictonary

Change the currently in use Dictionary to a different one with a simple drop down menu.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Change Text Direction

Change the text direction from left to right or right to left

Change the text direction from left to right or right to left.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Codefisher

Open Codefisher.org

Opens various pages of the Codefisher.org website.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Cookie Exceptions

Open the Cookie Exceptions dialog

Open the cookie exceptions dialog.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey