chrome://flash on my browser shows the following timestamped log - exposing times when Chrome was used. Clearing browsing data does not remove this:
About Flash
Google Chrome 65.0.3325.181 ()
OS Mac OS X
Flash plugin 29.0.0.113 /Users/eladalon/Library/Application Support/Google/Chrome/PepperFlash/29.0.0.113/PepperFlashPlayer.plugin
--- Crash data ---
crash id Thursday, 1 January 1970 at 01:00:00
crash id b584a8477b4f2218 Tuesday, 27 February 2018 at 21:13:30
crash id fe6476ec7b8ff16e Thursday, 1 February 2018 at 23:09:21
crash id 184ddaa99fd7cc43 Monday, 1 January 2018 at 15:45:37
Comment 1 by rschriebman@chromium.org
, Mar 28 2018