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<p>I don't see how that would work... for that case it seems more
reasonable to keep developing it as an add-on (experiment or not)
and make sure the add-on users are paying or donating enough to
the add-on to keep development of it sustainable.</p>
<p> -Magnus<br>
</p>
<div class="moz-cite-prefix">On 16-10-2019 15:03, Axel Grude wrote:<br>
</div>
<blockquote type="cite"
cite="mid:d0d9c00b-8532-8da5-6862-16535efcd717@gmail.com">
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<p>Dear Magnus,</p>
<p> </p>
<blockquote type="cite">or add-on authors going forwards, there
is of course also an option C (depending on what the add-on
does): work with us to integrate the functionality into core.
</blockquote>
I actually thought about this myself - if it means not losing
the "privileged access" to the JavaScript / XPCOM layer it may
mean a lot less work than constantly adapting an Add-on. There
is only one problem - over the 10 years I am working4 on this
project I have managed to turn it into a paid / self-employed
thing, and with the amount of work ahead and to maintain the
functionality, the only way to recoup would be to turn into a
Thunderbird employee. <br>
<p>I am not sure if that's the correct way forward for me -
would it possible to imagine a specialized / subcontractor
position for an Add-ons developer so they can focus on just
that specific work / functionality, rather than being deployed
into stuff we may not be interested in? <br>
</p>
<p>The other argument against core is that only a small group of
users may be interested in the functionality of these legacy
extensions, and by rights <i><b>they </b></i>should be the
ones funding that. A "Thunderbird advanced" / freemium model
might be a way out here. Just brain storming...<br>
</p>
<p>Axel</p>
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<div id="mySignature"> <b class="myName"><a
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Grude</a></b> <br>
Music Production and Composition <br>
Thunderbird Add-ons Developer <span class="AddonList">(<a
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<div id="newHeaderAG1" style="font-size: x-small; padding:1em;
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<b>Subject:</b>Re: Intent to de-support: traditional add-ons<br>
<b>From:</b>Magnus Melin <a class="moz-txt-link-rfc2396E"
href="mailto:mkmelin+mozilla@iki.fi"
moz-do-not-send="true"><mkmelin+mozilla@iki.fi></a><br>
<b>To:</b><a class="moz-txt-link-rfc2396E"
href="mailto:tb-planning@mozilla.org"
moz-do-not-send="true"><tb-planning@mozilla.org></a>
<br>
<b>Sent: </b>Tuesday, 10/15/2019, 11:19 11:19 IST +0100
[Week 42]<br>
</div>
</blockquote>
</div>
<blockquote type="cite"
cite="mid:96f3cb1a-8052-2f76-3211-e54998c85d28@iki.fi">
<p>A few clarifications:</p>
<p>The changes are for the general public only going to come
into effect in the next ESR release, Thunderbird 78 in mid
2020. For developers, in beta and nightly support will start
to disappear from core once we're ready do so, probably during
2019. Some notable things that will be removed are the custom
overlay loader (Overlays.jsm), and support for add-ons
requiring restart.<br>
</p>
<p>For add-on authors going forwards, there is of course also an
option C (depending on what the add-on does): work with us to
integrate the functionality into core. If the add-on is under
the bug-fix category this is certainly the way to go as no API
for a bug-fix would be in sight. In general we're happy to
include functionality provided it's of general usefulness. <br>
</p>
<p>MailExtension Experiments is one way to go (and that's not
deprecated), but should not be seen as a long term solution.
It may be a short term solution though. It means you need to
follow changes closely and things will often break. Sometimes
in ways that could be hard to solve. They simply need to be
understood to be seen as experiments, with no warranties.</p>
<p> -Magnus<br>
</p>
<div class="moz-cite-prefix">On 01-10-2019 16:02, Magnus Melin
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:2bb9a19f-904c-e50c-33f1-eecabcc8b860@iki.fi">
<p>Since version 57, Firefox only supports add-ons through the
WebExtensions APIs. At the time, Thunderbird decided to
continue supporting traditional add-ons, since we hadn't yet
been able to develop replacing APIs for add-on developers to
use. <br>
</p>
<p>Since then, Thunderbird has been developing WebExtensions
APIs (aka MailExtensions), and the number of APIs available
is continuously growing: <a class="moz-txt-link-freetext"
href="https://thunderbird-webextensions.readthedocs.io/"
moz-do-not-send="true">https://thunderbird-webextensions.readthedocs.io/</a><br>
</p>
<p>Because the toolkit support for traditional add-ons has
been largely removed, this has meant a lot of work for
Thunderbird to keep things going for add-ons. For the server
side it has also meant a lot of extra work
(addons.thunderbird.net is a fork of addons.mozilla.org).
Add-on developers haven't had an easy ride either: The
number of changes to make an add-on compatible has been
significant. <br>
</p>
<p>Going forwards we want to change this. Support for
traditional add-ons is going to be dropped as soon as we're
ready to do so internally. There are a few pieces of code
that we need to convert over internally: <br>
</p>
<ul>
<li>Lightning: to be integrated into the code base<br>
</li>
<li>Mozmill (used in our test infra): we're converting over
to using mochitests instead</li>
</ul>
It's not yet clear exactly when we're ready to rip out the
support for traditional add-ons from the code base, but it
should be whitin the Thunderbird 72 time frame - so by end of
2019. The next major version of Thunderbird, version 78, will
be out around June 2020. Up until then, code wise many things
are going to change. For instance, what is left of XUL will be
gradually going away, and documents will shifted to being
XHTML with a less and less XUL flavor. <br>
<p>Dropping support for non-MailExtension add-ons is also
needed for addons.thunderbird.net. Supporting old-style
add-ons would require a significant investment in the
back-end there, since the Django version of the back-end
would reach EOL and have to go through a painful and
expensive upgrade.</p>
<p>As an author of a traditional add-on, what should you do?
There are two routes: A) convert your add-on to a
MailExtension. If the API you need doesn't exist yet, <a
moz-do-not-send="true"
href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird&component=Add-ons:%20Extensions%20API">tell
us about it</a>. B) convert your add-on to a <a
moz-do-not-send="true"
href="https://thunderbird-webextensions.readthedocs.io/en/68/how-to/experiments.html">Web
Extension Experiment</a>. Most add-ons should be able to
be converted to an experiment with a reasonable effort. The
recommended path is forward is to convert it to an a
MailExtension though. That will make sure the add-on works
without significant changes over many years. If you go with
option B, you'll have to maintain a lot of more code
yourself and breakages can and will be bad unless you keep
up really close. MailExtension Experiments should be seen as
such, experiments with the goal of getting the API they need
into Thunderbird core. Please work with us on getting the
needed pieces in as a supported API. Initially we'll be
allowing experiments to be exposed to the general public,
but over time (years) Thunderbird will gravitate towards not
having the experiments available to the general public, the
same way it works for Firefox.<br>
</p>
<p> -Magnus<br>
</p>
<br>
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