Unknown JavaScript is slowing my page

[KarriK]

Hi, 

Google Speed Test shows some unknown JavaScript (connect.facebook.net) which is slowing my page down. I cannot locate it from my website code.
Here is link to speed test: https://developers.google.com/speed/pagespeed/insights/?hl=com&url=https%3A%2F%2Fsuojakuoret.com%2F

Any ideas which app/third party has installed this and how could I remove it? 

Thank you!
Br, Karri

[Syed_Mustafa]

Hi,   KarriK hopes you are doing well and great this is Syed Mustafa an experienced Shopify Developer I've gone through your issue details and it matches my expertise I can solve this issue for you because it can't be done by any third party app it can be done by custom coding your website speed is down especially for mobile users it needs complete web optimization I also attached the screenshot of the mobile speed below for further details but it will be a paid service so if interested please feel free to discuss with me at Syedmustafanadeem99@gmail.com. Thanks 

[KenMc]

Looks like you're talking about something using FB to login or create an account. this code is usually associated with that action. You may want to look at your theme and see if this feature is built in or one of your plugins is trying to add the feature.