Import and export calendar files in vCalendar (.vcs) format
Adds support for 3e calendars
About:about Button No Restart
A button that lists all the about pages that exist. Some of these pages are also provided as separate buttons.
Baby cats and kittens in the about box...
A Mozilla Messaging addon to assist in product support.
Export/Import Account Settings.....
Simply add your signature manually (right mouse click) to your emails
Add-on Preferences Button No Restart
Displays a menu that allows you to open the option/preference window for any add-on that has one.
Adds Tools menu item to check Add-ons for updates. Includes toolbar icon.
Add-ons Button No Restart
Opens the Add-ons window to perform tasks on your installed Extensions, Themes, Plug-ins and Language packs.
Add more items to Add-ons Manager context menu.
Addons Manager Hilite No Restart
Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.
Type first letters of add-on name to find them in the list or press Ctrl+↑/↓ to switch between add-ons categories.
Additionally remember and restore last selected item in each list.
Show more addons recent updates
Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
Adds a Address Close Button to mail compose window.
AdSidebar No Restart
Live in harmony with ads.
AdSidebar is an alternative to traditional ad blocker extensions that benefits both the user and content creators. Ads are displayed in a sidebar on the right side of the screen.