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

Free Memory

Free Unused Memory

Free unused memory that Firefox is currently using.

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

Empty Trash

Empty The Trash Folder

Empty the Trash Folder

Compatibility: Thunderbird, Postbox SeaMonkey

Redo

Redo Last Change

Redo the late change.

Compatibility: Pale Moon Thunderbird, Postbox SeaMonkey

Search Messages

Open Message Search

Open the advanced message search window to find an email.

Compatibility: Thunderbird, Postbox SeaMonkey

Skip Trash

Delete message with out sending it to the Trash

Delete a message with out sending it to the Trash. This will completely remove the message so that it can not be recovered.

Compatibility: Thunderbird, Postbox SeaMonkey

Compact

Compact Folder

Compact all Folders; removes redundant information left from deleted messages.

Compatibility: Thunderbird, Postbox SeaMonkey

Find

Find Text

Open the find bar to find a word in the current page.

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