These are a ready make selection of some of the most popular buttons from the Custom Toolbar Button Maker
Thunderbird, Postbox
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.
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.
Compatibility:
Pale Moon
Thunderbird, Postbox
SeaMonkey
Empty Trash
Empty the Trash Folder
Compatibility:
Thunderbird, Postbox
SeaMonkey
Delete Junk
Empty the junk email folder of all junk email.
Compatibility:
Thunderbird, Postbox
SeaMonkey
Toolbars
Show and hide toolbars quickly and easily.
Toolbars use up valuable screen real estate, removing them frees this up to show more web page or email depending on what your doing.
Compatibility:
Pale Moon
Thunderbird, Postbox
SeaMonkey
Restart
Restart the current application after installing a new extension, theme or plug-in.
There is a number of reasons you may want to restart the program your using. Though having installed an extension is the most common. This button take all the hassle and work out of it.
Compatibility:
Pale Moon
Thunderbird, Postbox
SeaMonkey
Save
Save the currently open document, or image to a file.
Saving a page or email for later viewing or to send to a friend is a much needed functionality, so much so that there really should be a toolbar button for it.
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.
Compatibility:
Pale Moon
Thunderbird, Postbox
SeaMonkey
Undo
Undo last change/action.
Compatibility:
Pale Moon
Thunderbird, Postbox
SeaMonkey
About
Open the about window. Useful for checking exactly what version you have installed.
Compatibility:
Pale Moon
Thunderbird, Postbox
SeaMonkey