Thunderbird de-xbl effort finished!

Axel Grude axel.grude at
Thu Sep 19 12:39:10 UTC 2019

Dear Magnus,

well done to everyone involved!

Now it would be fantastic if somebody could assist in migrating FiltaQuilla. This 
extension one has been heavily affected by this move. I would see at it's core about 
75% of the code needs to be rewritten. I have seen a pattern in Thunderbird that uses 
the function MozXULElement.parseXULToFragment in order to overload / inject xml, but I 
am not very sure what is happening at all, and whether this is "ninja style" 
programming or the official way of replacing xbl in order to create (sometimes 
customized) controls in the filter conditions / actions dropdowns.

If anyone is interested in helping, I made a new source tree at:

the basic idea is removing bindings.xml 

and put the xml code into filtaquilla-wx.js 


*Axel Grude <mailto:axel.grude at>*
Music Production and Composition
Thunderbird Add-ons Developer (QuickFolders 
quickFilters <>, 
QuickPasswords <>, Zombie Keys 
<>, SmartTemplate⁴ 
Visit my YouTube Channel <> for email 
productivity tips Get Thunderbird!
> *Subject:*Thunderbird de-xbl effort finished!
> *From:*Magnus Melin <mkmelin+mozilla at>
> *To:*Thunderbird Planning <tb-planning at>
> *Sent: *Thursday, 9/19/2019, 10:04 10:04 GMT DT +0100 [Week 38]
> As you may know, for the past year the Thunderbird team has put a lot of work into 
> migrating away from the Mozilla proprietary XBL technology, and as of today, I'm 
> happy to announce we're now XBL free!
> Thanks, and congrats to everybody who participated in this effort! Especially 
> Khushil Mistry, Paul Morris, and Alessandro Castellani each converted many bindings. 
> Also a big thanks to the mozilla-central de-XBL team whose background work made this 
> possible.
> XBL over time
>  -Magnus
> _______________________________________________
> tb-planning mailing list
> tb-planning at
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