I have a browser extension which opens new tabs. It opens them 'pinned' as follows:
chrome.tabs.create( { url: url[0],
active: false,
index: 0,
pinned: true
}
);
This has been working well, until recently when Opera updated itself. Since the update, tabs are no longer opened in pinned state, but as normal tabs.
It seems to me that something was broken with the Opera update.