Default notification setting
Supported on: Microsoft Windows 7 or later
Registry
HKLM
Software\Policies\Google\Chrome HKCU
Software\Policies\Google\Chrome Options
DefaultNotificationsSetting enum - Allow sites to show desktop notifications
->
1 - Do not allow any site to show desktop notifications
->
2 - Ask every time a site wants to show desktop notifications
->
3
Description
Setting the policy to 1 lets websites display desktop notifications. Setting the policy to 2 denies desktop notifications. Leaving it unset means AskNotifications applies, but users can change this setting.