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

Thunderbird, Postbox

Work Offline

Toggle work offline

Toggle Work Offline and Work Online.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Edit Menu

Show the edit menu

Show the edit menu.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

File Menu

Show the file menu

Show the file 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

Undo

Undo Last Change

Undo last change/action.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

View Menu

Show the view menu

Show the view menu.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

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

Toolbar Display

Change Toolbar Icon Size and Display Mode

Set the toolbar icon size as either large or small, and the button display mode between icons, icons and text, or text only.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

about:about

List and open any of the about pages

Lists all the "about" pages so that they can be opened.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Customize Toolbar

Customize toolbar, add or remove buttons etc.

Open the customize toolbar window to add or remove items from your toolbar.

The customize Toolbar window is where every button from this extension and others like it get placed for you to then move to your toolbar. Creating the perfect set up is always a moving target that is never quite achieved, but this will make it a little quicker to get there.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey