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

Thunderbird, Postbox

Undo

Undo last change/action.

Install Undo

Download Undo

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

about:config

Open about:config to change hidden settings that cannot be edited from the Options window.

All Mozilla based programs have settings that can not be changed in the options window. These hidden settings are all reveled in the about:config where anything can be changed or reset.

Install about:config

Download about:config

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Select All

Select all the text in the current text box, web page, etc.

Install Select All

Download Select All

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Work Offline

Toggle Work Offline and Work Online.

Install Work Offline

Download Work Offline

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Add-ons

Opens the Add-ons window to perform tasks on your installed Extensions, Themes, Plug-ins and Language packs.

The Add-on's window allows the installation and management of all your extensions and themes. If you need an update, change a setting, swap themes or enable/disable an add-on the Add-ons' window is the place to go. Being able to access this quickly is a necessity for anyone that uses even a handful of add-ons.

The button also contains a drop down menu that allows you to install add-ons, open the add-ons window to the extension or themes tab, or set which websites can install addons.

Install Add-ons

Download Add-ons

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Redo

Redo the late change.

Install Redo

Download Redo

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Empty Trash

Empty the Trash Folder

Install Empty Trash

Download Empty Trash

Compatibility: Thunderbird, Postbox SeaMonkey

Add-on Preferences

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

Install Add-on Preferences

Download Add-on Preferences

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Print Preview

Open the Print Preview to view a page before printing it.

Paper costs money (and trees) so it is worth checking what the page looks like before you print it. Though it has always amazed me just how much the button gets downloaded.

Install Print Preview

Download Print Preview

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Menu

Show all the menus in a single menu.

Install Menu

Download Menu

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey