And the “Brave Browser Helper . . . .diag” crash reports within:
/Library/Logs/DiagnosticReports/
After you install and have imported bookmarks (from wherever you save them as a bookmarks.html file), please practice a routine of backing up Brave Browser bookmarks by using the Bookmarks Manager > Export button (that produces “bookmarks.html” files, that ought to be saved anywhere but NOT inside some Brave Browser folder.
IMHO, a worthwhile backup application for Mac OS and Windows OS and mobile devices - GoodSync: