It says in the Opera API (Formats: Manifest Files):
homepage_url
The URL of the homepage for this extension. The extensions management page will contain a link to this URL. If you distribute your extension using the Opera addons site, the homepage URL defaults to the extension's own page.
But from using ExtensionInfo.hompageUrl
, those extensions without homepage_url
in manifest will just give blank instead of its Opera addons site url.
On Chrome's side it works as expected.
It's a bug. I've just reported that. Thank you for the info!