How to remove your Baidu account
To remove the Baidu extension from your browser(s), use the following instructions.
Internet Explorer
Click “Start.” Select “Settings,” and then “Control Panel” and then “Add/Remove Programs.”
Scroll to Baidu on the list of programs.
Click “Change/Remove.”
Firefox
Select “Tools” and then “Add-Ons” in the browser menu.
Select the “Extensions” tab.
Select the Baidu toolbar.
Click “Uninstall.”
Safari
Click on “Applications” in the browser menu.
Scroll to “Toolbars” and click on Baidu.
Click twice on “Uninstall.”
Enter the “Username and Password.” Click “OK.”
Chrome
Right-click on the extensions bar.
Select “Uninstall.”
Choose “Uninstall” again.
Source: https://www.ehow.com/how_8360768_delete-baidu.html
Helpful Trick: Removing online data
Publicly visible text/images often aren’t properly removed even when you succeed in removing an account. Try editing or removing them manually before removing the account itself. If you’re unsure what happens to your tracks: this can be found mostly in the Terms of Service/Privacy Policy; otherwise you can always contact Baidu and ask personally. By the way, removal requests don’t necessarily mean your data will actually be removed (e.g. due to legal obligations).
Helpful Trick: Remove third-party logins
If you signed up for Baidu using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Baidu. Click here to find out how.