Rebase Orfox patches onto Tor Browser 8.0 for TBA
This is a replacement for #26338 (moved). We decided Tor Browser for Android should be based on ESR 60 because Mozilla Firefox for Android (Fennec) is currently in maintenance-mode - the diff between releases will be very small, and we will backport any security-related patches. Basing TBA on ESR60 means we can use the same git branch for desktop and mobile.
[0] https://lists.torproject.org/pipermail/tbb-dev/2018-June/000852.html