Google search results very often have links to Python 2 docs page. However, if you are programming in Python 3, switching to version 3 docs constantly may be pretty annoying. Same thing if you're not using the latest version of Python 3 and want to always see a specific version. This extension does that for you.
The extension is available on:
When on docs.python.org you can click on the extension icon to temporarily disable redirecting or to set the Python version that you'd like to redirect to. 3 will select the latest available version and the values only take one minor version (ie. 3.6, 3.7) since that's what's used in the URLs.