Merge pull request #527 from adam-p/fix-tbird-intl

Fix #524 and #526: Broken in non-English Thunderbird

Merge pull request #520 from adam-p/tbird-fix

Fix #495: Stopped working in Thunderbird 60

Merge pull request #433 from adam-p/firefox-webextensions

Merge WebExtensions changes

Compress zip to be accepted by Chrome store

Bumped version number

Updated translations

Bumping version for another Mozilla release

Released a no-change version to try to correct Mozilla review issues.

Release prep

Updated Sof's link