F-Secure browsing protection takes extreme cpu power
With browsing protextion (F-secure SAVE 17.4) enabled on Safari (12) on my Mac certain webpages (esp. those with many ads) will take extreme cpu power. Activity monitor shows >200% for longer times. Frequently the spinning wait cursor is shown. Scrolling down is delayed.
This has started a few months ago, I think around updating to Mojave.
Is there a way to solve this?