Proposal to start a new implementation of Thunderbird based on web technologies

Philipp Kewisch mozilla at
Tue Apr 4 20:46:51 UTC 2017

On 4/4/17 10:38 PM, Magnus Melin wrote:
> On 4/4/17 1:00 AM, Ben Bucksch wrote:
>> The gradual rewrite is what has failed. That's not just a
>> possibility. We tried and failed. As you said above, we wanted to do
>> it since a long time, and never succeeded. Thinking that we'll
>> suddenly succeed now, with less resources, is merely wishful
>> thinking. And if that fails, Thunderbird is dead for good, because
>> XUL is going away eventually. 
> Unfortunately AFAIK there was never any serious resources from
> MoMo/MoCo put into rewriting anything to web technologies.
> One of the valuable things they did put resources into was creating
> and setting up the testing infrastructure. With your proposed start
> from scratch model all you'll get no test coverage at all, and that's
> really bad. Things just aren't that easy to get right in the details. 
Yes, we won't be able to re-use our current tests a lot, but when
rewriting from scratch, part of the work is ensuring a testing framework
is set up, so I'd consider this specifically a non-issue.


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