Thanks for these very simple and effective instructions! I was finally able to set up my profile picture ;)
Just one thought for improvement, though. When I did the step 3 (click on your picture and copy the url), I did it wrong, because I copied the URL at the top of the browser and not the URL displayed below the picture. Maybe some little clarification would help, for example: "click on your picture and copy the url that is displayed below the photo" (or something like that).