FYI...

Firefox 57.0.3 released

Start Firefox, then >Help >About >Apply Update ...
-or-
Download: https://www.mozilla.org/en-US/firefox/all/

> https://www.mozilla.org/en-US/firefo.../releasenotes/
Dec 28, 2017
Fixed: Fix a crash reporting issue that inadvertently sends background tab crash reports to Mozilla without user opt-in (bug 1427111)