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Copy keywords from thread parent in Thunderbird
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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.


  • Tested with Thunderbird 68.4.1 and FiltaQuilla 2.0.
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