- Disable webrtc for aarch64 due to bmo#1434589
- Add patch to fix skia build on AArch64:
* mozilla-fix-skia-aarch64.patch

- update to Firefox 60.0.1
* Avoid overly long cycle collector pauses with some add-ons installed
(bmo#1449033)
* After unckecking the "Sponsored Stories" option, the New Tab page
now immediately stops displaying "Sponsored content" cards (bmo#1458906)
* On touchscreen devices, fixed momentum scrolling on non-zoomable pages
(bmo#1457743)
* Use the right default background when opening tabs or windows in
high contrast mode (bmo#1458956)
* Restored translations of the Preferences panels when using a
language pack (bmo#1461590)

- parellelise locales building