Access to 3rd Party JS to Remove Unused Code

[AnnaSleep1997]

Dear All,

I am aware that alot of developers are having similar question to mine, Kindly note that I have tried getting out from this with a solution but it seems that I need an expert help.

I have a website based on 3rd party theme that is "stockholm" I am selling mattresses and so I need Facebook, Google and Tiktok pixels to get me some data, in the same time it is affecting my website speed so much. 

Website URL: anna-sleep.ae

I tried searching for JS files or tags I have found some and added async="async" but no use.

I wish I can get an access to the files directly as google devtools is showing those  JS files and the unused code inside of them. 

I would appreciate your help in this case.

[AnnaSleep1997]

To add on my question,

I have found that I can get facebook code and add it manually from their Events Manager page.

my concern is that I already have connected my website with facebook pixel through shopify facebook application will that be a problem if I dropped the app in shopify and then added the code manually.

In that way I can at least modify the code and then get my website running faster.

Regards,