You can easily whitelist Copy To Notion from the settings of your Chrome browser.
1. Open the Chrome browser
From the Chrome home page, click on the three vertical dots menu in the upper-right corner. From the menu that appears, click on the ‘Settings’ option to continue.
2. Click on the ‘Privacy & Security’
Click on the ‘Privacy & Security’ tab from the left section to proceed.
3. Click on the ‘Cookies and other site data’
From the right section, click on the ‘Cookies and other site data’ option to continue.
4. Click on ‘Add’
Now, click on the ‘Add’ button following the ‘Sites that can always use cookies’ field. This will bring an overlay window.
5. Enter [*.]copytonotion.com
Finally, enter [*.]copytonotion.com. Then, click on the ‘Add’ button to whitelist it.
If you're still being prompted to enable third-party cookies, please try selecting "Block third-party cookies in Incognito mode” or “Allow third-party cookies”:
Now, once you have whitelisted copytonotion.com, go back refresh the page and start using the extension.