Fixed
Firefox 45.0.1, See All New Features, Updates and Fixes
Fix a potential performance regression (Youtube for example) (1220502)
Fix a regression causing search engine settings to be lost in some context (1254694)
Bring back non-standard jar: URIs to fix a regression in IBM iNotes (1255139)
XSLTProcessor.importStylesheet was failing whenwas used (1249572)
Fix an issue which could cause the list of search provider to be empty (1255605)
Fix a regression when using the location bar (1254503)
Fix some loading issues when Accept third-party cookies: was set to Never (1254856)
Changed
Disabled Graphite font shaping library
Fixed Various security fixes
http://www.mozilla.jp/thunderbird/38.7.0/releasenotes/
Firefox 45.0.1とThunderbird 38.7.0がリリースされていました。