Hide Doodles for Chrome
More About Hide Doodles
It replaces doodles with the default logo, for a less distracting search experience. Also sets the logo to the default in Gmail.
If you'd like to see the source code, it's on GitHub.
It'll request to read and change data on www.google.com, because it's modifying the doodle element on those domains.
If you notice a problem, or have other questions or comments, open an "issue" on GitHub: