Edge is sharing Chrome site logins. How do I prevent this?

This issue was bothering me allot as well. Here's what I did to fix the issue in Edge Browser:

Edge Browser:

1. Goto Settings -> Profiles

edge://settings/profiles

Click Import browser data -> Choose what to import

Unchecked all the options and checked only personal info

2. Stay on profiles: edge://settings/profiles

Click Import browser data on each launch -> Click Turn Off

3. Clear cookies and browsing history

Goto Settings -> Privacy -> Clear Browsing Data

edge://settings/privacy

Click choose what to clear -> Select All Time -> Select All Options -> Click Clear Now

4. Restart your Edge Browser

Thanks for coming back to me.

• Is the computer joined to a domain, e.g. at work or school?

No.

• Do you have more than one account listed under Accounts used by other apps?

No.

• Do you have more than one profile configured? (Click on the profile picture to see.)

No.

• Do you sign in to the profile(s)?
  • If so, do you use a Microsoft Account or a 'Work or school account'?

Microsoft account. Does that answer the question? FWIW I also use that account on my laptop where I have not seen this issue.

• On which site are you seeing this behaviour? The only one I noticed it is this one, but it’s also the site I use the most. https://www.deviantart.com
  • Does this site allow for different types of sign-in, e.g. Sign in with Microsoft | Google | Facebook | Email? No.
  • Do you sign in at this site with a Microsoft Account or a 'Work or school account'? No.

I’d log in on Chrome, run Edge and I’d be logged in there. I’d log in with a different account on Edge, and Chrome would mirror that change.

I can't offer any solution, I'm afraid. What you're describing is quite bizarre, and it sounds impossible. There is no way that the two browsers are sharing information; while they have a lot of common functionality through their Chromium connection, both the program files and the user data are kept quite separate.

Each Edge profile has its own settings, making it easy to use more than one profile to access the same website with different user accounts and credentials with no cross-pollination of data.

What is possible is that Windows is trying to be helpful by signing you in automatically where possible. You can control this behaviour at Windows settings ⚙ > Accounts > Email and accounts > Accounts used by other apps.

It might be possible to troubleshoot your situation if you gave the following information about Edge:

• Is the computer joined to a domain, e.g. at work or school?
• Do you have more than one account listed under Accounts used by other apps?
• Do you have more than one profile configured? (Click on the profile picture to see.)
• Do you sign in to the profile(s)?
  • If so, do you use a Microsoft Account or a 'Work or school account'?
• On which site are you seeing this behaviour?
  • Does this site allow for different types of sign-in, e.g. Sign in with Microsoft | Google | Facebook | Email?
  • Do you sign in at this site with a Microsoft Account or a 'Work or school account'?

Other users seeing the same behaviour are welcome to post their replies to these questions.

Same here. I like Edge a lot, but it’s useless to me if it shares the same session. I’ve switched over to Firefox.