No Default Bookmarks
Supported on: Firefox 60 or later, Firefox 60 ESR or later
Registry
HKLM
Software\Policies\Mozilla\Firefox HKCU
Software\Policies\Mozilla\Firefox Value name: NoDefaultBookmarks
Enabled: NoDefaultBookmarks = 1
Disabled: NoDefaultBookmarks = 0
Description
If this policy is enabled, the default bookmarks and Smart Bookmarks (Most Visited, Recent Tags) are not created. If this policy is disabled or not configured, default bookmarks and Smart Bookmarks (Most Visited, Recent Tags) are created. Note: this policy is only effective if used before the first run of the profile.