New tabs not restored after a browser crash

[Olivier Tilloy]

If during a browsing session I open a number of new tabs and at some point the browser process crashes (for whatever reason), at the next launch it won’t restore the tabs I had opened in the session that crashed.

This is because the state is serialized on disk only when the app goes in the background.

We should have a timer that periodically saves the state, to mitigate this issue.