Register or Log in
Other Applications

Add-ons

Extensions
Themes
- Most Popular
- Top Rated
- Newest
- Abstract
- Causes
- Fashion
- Film and TV
- Holiday
- Music
- Nature
- Other
- Scenery
- Seasonal
- Solid
- Sports
- Websites
Want more customization? Try Complete Themes
Collections
More…

Welcome to Thunderbird Add-ons.

Add extra features and styles to make Thunderbird your own.

Close

On the go?

Check out our Mobile Add-ons site.

Close

Filter Results

Category
- All Add-ons
- Extensions
  - Tags
Works with
- Any Thunderbird
- Thunderbird 9999.0
- All Systems
- Linux
- Mac OS X
- Windows
Tag
- All Tags
- calc
- calculator
- firefox57
- office

1 matching result

Search

Sort by:

Relevance
Most Users
Top Rated
Newest
More

ThunderCalc

A simple calculator for Thunderbird/Sea Monkey/Firefox, available in a pop-up window or a separate tab.

Not yet rated

3 users

To create your own collections, you must have a Mozilla Add-ons account.

Create an Add-ons Account

or log in to your current account

get to know add-ons
About
Blog
Developer Hub
Forum

Other languages

Privacy Policy | Report Trademark or Copyright Infringement | Legal Notices | Report Misuse of Thunderbird Trademark | Report a bug

Except where otherwise noted, content on this site is licensed under the
Creative Commons Attribution Share-Alike License v3.0 or any later version.