A simple Thunderbird addon that adds a Proton Mail button to the toolbar.
In contrast to the official paid Proton Mail Bridge client, this addon does not add your Proton Mail account to Thunderbird. Instead, it opens the Proton Mail website as a new tab inside of Thunderbird. If you want to use Thunderbird's mail features, you must use the paid official Proton Mail Bridge client.
The file "mail-logo-greyscale.svg" is property of the Proton AG.
All other files in this repository are licensed under the MIT license.