Finding and downloading add-ons is easy. Sorting through the available add-ons and finding the ones you want, is the difficult part. There are so many really good ones. Thankfully, there is no limit to the number of extensions you can add to Thunderbird.
- Open Thunderbird.
- Select Tools - > Add-ons from the menu bar. In the pop-up window, click the Extensions icon in the upper left, then click Get Extensions in the bottom right. Your web browser will open and you'll be taken to the Mozilla Thunderbird Extension web page.
- If you're looking for an extension to perform a specific task, enter the search criteria in the search box, and select a category from the drop down menu, if applicable. You'll get the most results if you select all add-ons from the drop down.
- Click the arrow to the right of the drop down menu.
To browse all available add-ons in a specific category, select from the menu on the left.
You can sort by most popular, highest rated, most recently updated, or view them all by using the menu on the right. Pay attention to ratings, and be sure to read any comments available about the add-ons you're considering. Some extensions are better than others and quality is usually reflected in in comments and ratings.
When you find the add-on you want, select Download Now.
Save File.