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Thunderbird 91 extensions don't load

mozilla-kgi
mozilla-kgi
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When TB recently updated from 78.14.0 (64 bit) to 91.2.0 (64bit), all my extensions did not load. I reviewed and verified they are compatible with 91. Toggling the enable/disable in add-ons manager did nothing although some mysteriously did get disabled. Restarting TB from scratch had no impact. (I note that closing TB tends to cause a crash.)

I was able to get the most extensions to function if I re-installed them into TB but the minute I closed TB and restarted, they all went away again.

I note that clicking on "Check for Updates" causes an "Updating add-ons" message to appear.....forever.

What gives? This is only slightly less painful than the transition to 78.....argh!

When TB recently updated from 78.14.0 (64 bit) to 91.2.0 (64bit), all my extensions did not load. I reviewed and verified they are compatible with 91. Toggling the enable/disable in add-ons manager did nothing although some mysteriously did get disabled. Restarting TB from scratch had no impact. (I note that closing TB tends to cause a crash.) I was able to get the most extensions to function if I re-installed them into TB but the minute I closed TB and restarted, they all went away again. I note that clicking on "Check for Updates" causes an "Updating add-ons" message to appear.....forever. What gives? This is only slightly less painful than the transition to 78.....argh!

Chosen solution

Reporter,

I don't think making a new profile is a proper solution or workaround here (though I haven't thoroughly read everything). But if it comes to that, don't delete your old profile.

Perhaps you are seeing Bug 1732515 - TB 91 - ANY addon causes problems - no add-ons work and does not shut down cleanly?

If not, I would file a bug report https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird

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mozilla-kgi
mozilla-kgi Question owner
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A note of thanks to the TB team.

I've tested the workaround with both my WIN10 TB91 and WIN7 machines and it appears to work.

In addition to my Win10 TB78-TB91 transition debacle I had another WIN7 machine running TB78 with an identical profile that was poised to do the upgrade on restart. I was able to keep the WIN7 TB78 instance running while sorting my WIN10 instance issues but was nearing a point where I was being forced to reboot my WIN7 TB78 machine. Per the workaround, I reconfigured the profile to disable the enable/disable online prompt and held my breath as I restarted the machine and TB.

The fabulous news was that the TB78-91 transition went without much of a hitch. I did lose a few add-ons to compatibility issues but the core set were updated and booted as enabled.

I only wish this workaround was known about two weeks earlier! I could have avoided rebuilding the entire profile on the WIN10 machine but I really appreciate the support.

Bravo team for tracking this down.

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