Last week I've installed Thunderbird on a new Debian Jessie system using this -- without Multiarch; instability fears. From my previous system (Ubuntu 14.04) I've copied my Thunderbird profile directory into .thunderbird/ and redirected the profiles.initowards it. Sometimes everything works fine.
However, often Thunderbird just crashes. Don't know if it is related but two times also the system friezed entirely. Maybe this is related to this -- but have not enough reputation to make comments.
Here is the output of the terminal started Thunderbird.
_@_:/usr/thunderbird$ ./thunderbird-bin 1470683962553 addons.xpi WARN Exception running bootstrap method startup on {fe272bd1-5f76-4ea4-8501-a05d35d823fc}: ReferenceError: invalid assignment left-hand side (resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///home/_/.thunderbird/5aibcqp1.default/extensions/%7Bfe272bd1-5f76-4ea4-8501-a05d35d823fc%7D.xpi!/bootstrap.js -> jar:file:///home/_/.thunderbird/5aibcqp1.default/extensions/%7Bfe272bd1-5f76-4ea4-8501-a05d35d823fc%7D.xpi!/lib/ui.js:407:5) JS Stack trace: [email protected]:141:4 < @main.js:19:1 < [email protected]:141:4 < [email protected]:28:2 < [email protected]:4663:9 < [email protected]:2734:13 < [email protected]:227:12 < [email protected]:833:5 < [email protected]:1016:9 < [email protected]:2782:5 < [email protected]:58:7 [calBackendLoader] Using libical backend at /home/_/.thunderbird/5aibcqp1.default/extensions/{e2fda1a4-762b-4020-b5ad-a41df1933103}/components/libical-manifest 2016-08-08 21:19:52 autosyncActivities ERROR onDownloadCompleted: TypeError: this._syncInfoPerFolder[folder.URI] is undefined
libicalit looks like some Calendar app, but I cannot tell, I do not use thunderbird.