Whenever a text message gets forwarded from my phone (using Textra) to my browser I've noticed I receive it twice. One has the Textra app icon and the other has the contact's photo as the icon. Both of the notifications are identical other than that. (Edit) Never mind. I guess Textra doesn't need to be a forwarded app to still be able to receive text notifications on my desktop. Unchecking Textra solved the issue.