It's not just Google.com but any site using Compression Dictionary Transport (which google.com was an early adopter of - https://developer.chrome.com/blog/search-compression-diction...). The shared dictionaries are an additional storage added with this feature but are not getting correctly cleared on close.
A fix is being worked on to resolve that. Follow above bug if interested when that lands...
It's not just Google.com but any site using Compression Dictionary Transport (which google.com was an early adopter of - https://developer.chrome.com/blog/search-compression-diction...). The shared dictionaries are an additional storage added with this feature but are not getting correctly cleared on close.
A fix is being worked on to resolve that. Follow above bug if interested when that lands...