FiltaQuilla

Adds custom actions and search terms to the mail filter system.

Translations:
Russian: Ashed @ github.com - https://github.com/ashed

Currently compatible with Thunderbird 91. If you find bugs, please report them to:
https://github.com/RealRaven2000/FiltaQuilla/issues/

The full detailed change log can be found here:
http://quickfilters.mozdev.org/fq-versions.html#latest

For Thunderbird 78 conversion (which is currently ongoing) please check:
https://github.com/RealRaven2000/FiltaQuilla/issues/64

Latest beta for Thunderbird 78:
https://github.com/RealRaven2000/FiltaQuilla/releases/tag/3.0pre51

Source code:
https://github.com/RealRaven2000/FiltaQuilla/

I am currently rewriting for Thunderbird 78 compatibility. You can find a working prerelease here:
https://github.com/RealRaven2000/FiltaQuilla/releases/tag/3.0pre51

Important for Release channel users (**154 and later**): With Thunderbird's new 2-week release cycle, there is an elevated risk of unexpected breakages. While I regularly test FiltaQuilla against daily builds, timely fixes depend on **early reporting** from Release users. Please follow the issue tracker and report any regressions promptly to help maintain compatibility.

**Changes in 6.3.2**

- Made FiltaQuilla compatible with Thunderbird 160.*.
- Fixed save completion errors on Thunderbird 159 beta caused by the removal of `msgHdrFromURI`, which could also delay subsequent move actions. #421
- Fixed JavaScript editor failing to open when the calculated popup height was not an integer. #419

**Recent History: 6.3.1**

- Made FiltaQuilla compatible with Thunderbird 159.*.
- Improved startup reliability by allowing more time for Thunderbird windows to finish loading.
- Fixed errors in the Save Message as File filter action caused by a changed Thunderbird API. #417

**TO DO NEXT**

- Restore the “Folder Name” search term on newer Thunderbird versions #377.
- Support custom filenames when saving or detaching attachments #219.
- Review `attachRegEx_match` for current Thunderbird versions.

**Support My Work**

As I am often asked about added features for filter conditions and actions for my add-on [quickFilters](https://addons.thunderbird.net/addon/quickfilters/), FiltaQuilla is a better location for extending filter behavior—specifically by adding new types of actions and conditions. If you want to **support the FiltaQuilla project**, please install quickFilters and **purchase a [quickFilters Pro](https://quickfilters.quickfolders.org/premium.html) license.** You can also [donate directly here](https://quickfilters.quickfolders.org/filtaquilla.html#donate).

Some add-ons ask for permission to perform certain functions (example: a tab management add-on will ask permission to access your browser’s tab system).

Since you’re in control of your Thunderbird, the choice to grant or deny these requests is yours. Accepting permissions does not inherently compromise your browser’s performance or security, but in some rare cases risk may be involved.

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FiltaQuilla 6.3.2

by R Kent James, Realraven (Axel Grude)

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Version Information

Version 6.3.2 Released Oct. 22, 2026 783.5 KiB Works with Thunderbird 140.0 - 160.*