Extensions for www/chromium on a Pi3B

[bob prohaska]

Now that www/chromium compiles on a Pi3 it seemed time to try
setting up ublock-origin. The plugin shows up in the chrome store
and offers to install, but after clicking the install button the
progress dots bounce back and for but seem to make no progress.

In contrast, with www/firefox, ublock-orign installs and seems to
work correctly.

Is there a trick that I've missed?

Thanks for reading,

bob prohaska