Thanks for your feedback, but you can disable this behavior in the preferences ;)
Many users want the popup because of the rule generator. Not everyone uses the generator, but is interested in the changes, so the popup opens in the background. And for those who don't want that at all can disable it in the preferences :)
Why does LocalCDN ask for css to be allowed for Cloudflare, Google and Google fonts? Oh and I think rule sets for uMatrix and uBlock Origin should be included in release notes only when there is a new change in the rule sets. Keep up the good work!
It would be good to have an option to only see update notifications *if* uBlock rules need to be updated; The frequent update popups are very annoying if you have multiple browsers/profiles... (thank you for the frequent updates, though!)