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YouTube will have fewer ad breaks on TV — but the ads are getting longer
(www.theverge.com)
This is a most excellent place for technology news and articles.
All the major ones are already open source. uBlock Origin, uBlock, AdBlock, AdBlock Plus and AdGuard are all licensed under GPLv3. If anyone fancied starting another competing one for some reason they'd have plenty of codebases to choose from.