Rebase our Thunderbird custom package on top of 52.5.2
Feature Branch: feature/15033-thunderbird-52.5.2-2
Related issues
- Blocks #13245 (closed)
Original created by @intrigeri on 15033 (Redmine)
Feature Branch: feature/15033-thunderbird-52.5.2-2
Original created by @intrigeri on 15033 (Redmine)