* WebExtensions now run in their own process on Linux
* The Ctrl+Tab shortcut now displays thumbnail previews of your
tabs and cycles through tabs in recently used order. This new
default behavior is activated only in new profiles and can be
changed in preferences.
* Added support for Web Components custom elements and shadow DOM
- requires NSPR 4.20, NSS 3.39 and Rust 1.28
OBS-URL: https://build.opensuse.org/package/show/mozilla:Factory/MozillaFirefox?expand=0&rev=691
