• The start page can now be customised. The new start page from the addon will appear the next time you launch Edge or open a new tab.
• If you ever wish to change your default start page, you can install another start page extension. All you have to do to return to the default start page is disable or delete the addon.
• Click the three-dot menu button in the top-right corner of the main Microsoft Edge screen and select 'Extension.' Find and enable the start page extension you installed and enabled here. If you want to disable it, select the toggle. Click the 'Remove' button to get rid of the extension.

Read More: How do I enable and use Collections in Microsoft Edge?