Support of uBlock filters
How long we have to wait for support of ublock filters by built-in adblocker? Unfortunately, the supported filters do not well with all ads and seems that the ublock filters, that are possibly the most ultimate at this time, aren't compatible with Opera (trying of adding them ends with error)
we also need a button added to disable for some sites.
You can add more subscriptions to uBlock Origin than are listed in the filter page. It is easy to add subscriptions from this page:
By scrolling to the bottom of the filter page, you can see the new filter subscription that you added.
To block a site completely, you can add the hostname to a personal blocklist that you can add to "My filters". That list takes wildcards, so you can block a whole domain, if necessary.