Thunderbird Autotag

This filter automatically copies keywords from the previous message in a thread.

It is based on a Bug Bounties resolution, but with some changes to make it work nowadays.

How to use

1. Install the FiltaQuilla Add-on.
2. After installation, check the JavaScript Action mark in the Filter Actions tab of the add-on settings.
3. Restart Thunderbird.
4. Create a new filter:
   • Tick the Checking mail condition, make sure to select After classification.
   • Tick Periodically, every 10 minutes
   • In actions, select JavaScript Action and paste the contents of autotag.js into the JavaScript editor.

Notes

• Tested with Thunderbird 115.3.1 and FiltaQuilla 4.0b2
• The easiest debugging method is logging to the error console (Menu -> Extras -> Developer Tools -> Error Console) using the console.log() function.