Just like to announce an extension for thunderbird and Voidtools search everything working together.
Name of extension: "search in everything"
https://addons.thunderbird.net/En-uS/th ... verything/
How to Use
Basic instructions, highlight text in a message email, 'right click' pick menu item 'search in everything'
opens search everything and search for the highlighted term.
How to Install
Method 1: The Easy Way (via Thunderbird Add-ons)
Open Thunderbird.
Click the menu button (≡) and select Add-ons and Themes.
In the search bar at the top, type: Search in Everything
Click the + Add to Thunderbird button next to the extension.
Confirm the permissions by clicking Add.
Method 2: Install from File (for manual installation)
Download the .xpi file.
Open Thunderbird and go to Add-ons and Themes.
Click the Gear icon
Select Install Add-on From File...
Browse to where you saved the .xpi file and select it.
Click Add when prompted.
Don't forget to include the Warning in your post: