Alistair: in comment #26 you mention that you only had <email address hidden> in your profile directory. The extensions.json you attached in comment #25 also lists other extensions (not langpacks), I wonder whether one of them could be causing this. This would widen the scope of the problem.
Can you make a backup copy of your profile folder, and then try removing the .xpi files under /home/alistair/.thunderbird/gh0m9rq4.default/extensions/ one by one, launching thunderbird in between each removal, and let us know if/when it eventually starts successfully. It would be very useful to identify precisely which extension is causing the problem.
Alistair: in comment #26 you mention that you only had <email address hidden> in your profile directory. The extensions.json you attached in comment #25 also lists other extensions (not langpacks), I wonder whether one of them could be causing this. This would widen the scope of the problem.
Can you make a backup copy of your profile folder, and then try removing the .xpi files under /home/alistair/ .thunderbird/ gh0m9rq4. default/ extensions/ one by one, launching thunderbird in between each removal, and let us know if/when it eventually starts successfully. It would be very useful to identify precisely which extension is causing the problem.
Thanks!