instal the new version for apple Mozilla Thunderbird 115.3.1

Based on your key, you want me to help with installing the new version of Mozilla Thunderbird for Apple.

From the text, I noticed that there's an update available for Thunderbird, specifically version 115.3.1. To install this new version, here are the steps:

1. Open Thunderbird on your Mac.

2. Click on 'Help' in the top menu bar and select 'About Thunderbird'.

3. If an upgrade is available (as mentioned in the text), you'll see a notification. You can click on 'Upgrade' to start the download process.

4. Once the download completes, you'll be prompted to restart your computer to complete the upgrade.

Please note that if you're using an older version of Thunderbird, it's recommended to update to the latest version for security and feature updates.

Additionally, I'd like to mention that Firefox is no longer supported on Windows 8.1 and below. If you're using an affected operating system, you can download the Extended Support Release (ESR) instead.

If you have any further questions or concerns, feel free to ask!

Instal the new version for apple Mozilla Thunderbird 115.3.1