With both Google and Microsoft, if you’re logged into one service,
you’re logged into all of them. For example, if you use Gmail on
the browser, you become automatically logged in when you use
Google search. This means that Google can (and does) associate
your search query with your Google account. To counter this, you
can use Hide & Seek to hide your identity in Google search, while
still staying logged into Gmail.
Before using Hide & Seek, you’ll have to decide which Google and
Bing services you’d like to use logged out. Then, configure Hide
& Seek to hide your identity in those services. After that, you
can search as usual and your searches will be performed as a
logged out user. You can simultaneously use other Google or
Microsoft services (like Gmail or Outlook) in other tabs as a
logged in user.
Note that Hide & Seek has nothing to do with “blocking ads”. It is simply about maintaining your privacy and anonymity while using Google and Bing for web search. In my testing, it works like a charm.