There's a new banner shown on some of the technology Stack Exchange sites:

[![The Overflow banner][1]][1]

> Meet The Overflow, a newsletter by developers, for developers. Fascinating questions, illuminating answers, and entertaining links from around the web. [Learn more](https://stackoverflow.blog/2019/10/01/introducing-overflow-newsletter-cassidy-williams?utm_source=so-owned&utm_medium=announcement-banner&utm_campaign=the-overflow-newsletter&utm_content=october-launch)

Every podcast episode now seems to be similarly advertised:

[![Podcast banner][2]][2]

 > Podcast Episode #126: We chat GitHub Actions, fake boyfriends apps, and the dangers of Legacy code. [Listen now](https://stackoverflow.blog/podcast/).

When I dismiss these banners on e.g. [Stack Overflow](https://stackoverflow.com), I expect them to disappear from other sites as well. But that doesn't happen.

I regularly visit a lot of sites in the network, a permanent solution would be most welcome.  


  [1]: https://i.sstatic.net/XHSmG.png
  [2]: https://i.sstatic.net/OsTSN.png