What steps will reproduce the problem?
1. Have a vodafone/ vodacom phone or any other network that injects javascript
2.
3.

What is the expected output? What do you see instead?
html in callback should be the desired urls code, in my case it's a simple 
string. But when vodafone interferes it's the source of optimizing a website

What version of the product are you using? On what operating system?
Latest

Please provide any additional information below.