Google-chrome – How block Youtube ads on Google Chrome

Since Chrome doesn't allow to enable extensions in incognito mode only, you may use a different user profile for incognito mode, and set up the extensions you need for the incognito mode in this user profile.

In order to do it, create a shortcut on your Desktop with the following command (for Windows XP):

"C:\Documents and Settings\Your Username\Local Settings\Application Data\Google\Chrome\Application\chrome.exe" --user-data-dir="..\User Data\Inco" --incognito

This solution has two drawbacks:

1. You have to run the incognito mode via a separate shortcut.
2. You have to install and update the extensions for incognito and normal browsing separately.

Assuming you don’t have spyware installed showing you those ads, use Chrome and the AD Block extension and they should disappear.

To prevent tracking (retargeting) as opposed to blocking the ads have a look at something like Ghostery. More do not track info can be found here.