Download Thunderbird 31.4.0

Thunderbird 31.4.0

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By Mozilla Organization  (Open Source)

# Fixed
* The previous issues with jp mac builds have now been fixed, and Thunderbird will no longer need to be run in 32-bit mode.
* Security fixes
* Installing extensions within Thunderbird no longer requires download and installing as a file
* Autocomplete suggestion sort order was adjusted to prioritize entries where the search string matches the beginning of a word