Jeff Johnson said in a blog post that he had used the cookies and site data settings from Chrome's Preferences menu and also tried the direct way, using the chrome://settings/cookies in the address bar.
Using either of these routes, it was possible to enable the setting, ""Clear cookies and site data when you quit Chrome".
But he found that after a visit to YouTube, the database storage, local storage, and service workers were still there after shutting down Chrome and starting it again.
With Google search, he had a similar experience. While the cookies disappeared after restarting Chrome, the local storage still remained.
"Perhaps this is just a Google Chrome bug, not intentional behaviour, but the question is why it only affects Google sites, not non-Google sites. I've tested using the latest Google Chrome version 86.0.4240.75 for macOS, but this behaviour was also happening in the previous version of Chrome. I don't know when it started.
"Some people are going to read this article and say 'Use Safari instead of Chrome!' But it's important to note that Safari doesn't even have the feature to clear site data on quit, so Safari is actually worse. In this respect, Safari is years behind. Firefox and all of the Chromium-based browsers already have the clear site data on quit feature."
iTWire contacted Google for comment on this, but the company has not yet responded.