New stuff in Firefox 65:
- Support for AV1 (and also includes dav1d, although it does not have the full performance yet because Mozilla's build tools does not use asm)
- Support for WebP. Better late than never, but I have given up hope for WebP. It's a shame it didn't take off.
- MSI installer for Windows.
- Support for Handoff on MacOS.
- New tracking protection options. Only block in private window, block all trackers at all times, or custom settings.
- New way how languages are handled, making it easier to set preferences for languages and using multiple language packs.
- Some minor changes to the about:performance page.