Proposal: MailExtensions API to allow UI overlays, but no script injection

Eyal Rozenberg eyalroz at
Fri Oct 11 22:20:23 UTC 2019

On 12/10/2019 1:08, Geoff Lankow wrote:
> but having the ability to change any window and do anything to it /can 
> not/ and /should not/ continue.

Why? That is a keystone feature of Thunderbird's - the fact that UI from 
an extension code is basically on equal footing with in-app UI.

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