Chromium does need to be restarted to see the extension, just like firefox but I don't think our chromium package has a standard way to trigger that like firefox does. I'll investigate that.
To test it, switch to a guest session, open firefox, login to twitter.com, you should see the online account panel from g-c-c raised adding the credential.
I think best way to handle seeding it is to add it as a recommends to firefox and chromium. However, seeding xul-ext-webaccounts as a recommends in ubuntu-desktop might be more friendly for derivatives.
I fixed those issues in 0.4.5-0ubuntu3
Chromium does need to be restarted to see the extension, just like firefox but I don't think our chromium package has a standard way to trigger that like firefox does. I'll investigate that.
To test it, switch to a guest session, open firefox, login to twitter.com, you should see the online account panel from g-c-c raised adding the credential.
I think best way to handle seeding it is to add it as a recommends to firefox and chromium. However, seeding xul-ext-webaccounts as a recommends in ubuntu-desktop might be more friendly for derivatives.