Thank you! :)

Regaring your off-topic paragraph: Firefox allows more customization than EVERY other browser. Telemetry is good for users and everyone with an opinion about the product should keep it enabled. It's ridiculous that the people who disable telemetry are the same who are angry because Mozilla removes their favourite feature. Also, Mozilla does not spam their users. That's just not true at all.

Thank you very much! :)

Thank you!

It was a default feature of Firefox some years ago. But Mozilla had to remove it because it was abused by third party software to change the new tab page to adware pages without user consent. For that reason it's only possible for add-ons now.

Thank you!

Thank you!

Thank you!

Thank you!

This issue is not related to New Tab Override at all. It's a known Firefox bug that can happen under certain circumstances.

Thanks for the great rating!

Danke!