[Bug 218717] mail/thunderbird 52 is missing operative lightning (calendar) extension

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218717

--- Comment #2 from freebsd at dreamchaser.org ---
I was attempting to add the plugin because it did not come up when I started
tbird, and I was told on the mozilla list I could load it from the extension
pkg.

This is an old profile.  My error on the reference to a version 51.  Based on
the backup package created by portmaster when I built version 52, the previous
version I was running was 45.6.0_2.

If I move my ~/.thunderbird directory aside and start tbird, it comes up with
the calendar ok.

I suspect what happened is I hit a key/button by mistake and deleted the
lightning extension.  I'm guessing that if one does that, there's no way to
reactivate it without starting from a clean profile, since one can't install it
from the downloadable extension.  Does that make sense?

So, thanks for the hint about new vs. existing profile.

I fixed my problem by hand editing prefs.js to add the lightning extension to
extensions.enabledAddons and extensions.xpiState from an empty tbird startup
profile, and copying the lightning extension directory tree from the startup
profile into my profile's extensions subdir.  Don't know if that was the
"right" way to do it or not, but it seems to have worked.

However, I think an issue remains.  If one deletes the lightning extension
mistakenly, it seems like there should be a way to add it back in without
having to start from scratch and copy over existing data.

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