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

Thunderbird, Postbox

Add-on Preferences

Open the preference window of an add-on.

Displays a submenu that allows you to open the option window for any add-on that has one.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

About

About

Open the about window. Useful for checking exactly what version you have installed.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Profile

View your profile folder

View your profile folder to find files (such as you bookmarks) to back them up.

Finding your profile folder can be a slow and annoying process. So this button does it for you in a flash, no more digging though all your folders.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Status Bar

Toggle The Status Bar

Toggle the status bar from hidden to shown. Hide it to get the most out of your screen space, and show it when it really needed.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Edit Menu

Show the edit menu

Show the edit menu.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Themes

Open Themes Manager

Open the themes manager to change you theme or install a new one.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Toggle Proxy

Toggle The Proxy On & Off

Toggles the Proxy between on and off for quick changing of networks.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Run Application

Run an external application

Runs an external application

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Minimize

Minimize current window

Minimize the current window.

I hate popups that don't show the minimize button on the window itself. This has been my solution. Also when I use full screen mode, and then want to minimize the window, this again this comes in useful.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Toggle menu bar

Toggle the menu bar

Toggle the menu bar. Don't put this button on the menu bar!

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey