Hi
Extension version 1.7.1 with home-built Waterfox Classic 2019.10 (20191103135811) on FreeBSD-CURRENT. (Historically: Waterfox 56.0 was based on Firefox 56.0.2, the final release before Firefox Quantum.)
With the extension disabled, it takes less than five seconds to append (restore) a session with 64 tabs across three windows.
With the extension enabled, it takes around forty-five seconds.
The difference in timing is as if browser.sessionstore.restore_tabs_lazily
true
loses its effectiveness, but technically I can't tell whether that's the issue.
Any ideas?
TIA