Hello, I am a random person from the internet who totally wasn't at
the conference but have an interest & stake in this topic and joined
the group anyway.
1) You rock.
2) See also: ClickHint -
https://chrome.google.com/webstore/detail/fjlfhmodommidkcahnnjohgpnkemocna
& RescueTime -
https://www.rescuetime.com
ClickHint is functional but who knows where the developers went or if
they've been eaten by aliens or what.
RescueTime rocks in a whole lot of ways but is a commercial product
that may not always offer free accounts (although their basic account
& their thoughtful inclusion of the ability to export raw data in CSV
form means that this isn't a barrier at the moment). Also, why stop at
just one browser & just internet browsing time when there's a tool
that will track nearly every interaction on your computer @ a pretty
granular level & is very flexible, customizable, & will let you tell
it to stop sometimes too.
That being said, OpenSource is awesome & remains a certain level of
useful even if you, too, get eaten by aliens. Or work commitments
(more likely to happen, even if aliens are more fanciful & interesting
at the abstract level).