For logging across browsers in pub-sub fashion, using nothing more than a <script> tag.
git clone https://github.com/ericyoungberg/grogger
cd grogger
make
sudo make install
grogger [-p portNumber]
Now you can add a <script> tag for the host where the Grogger instance is located with an associated session endpoint
<head>
...
<script src="https://logs.ericyoungberg.com/some-session"></script>
...
</head>