Fastlane founder Felix Krause has revealed that Facebook and Instagram's in-app browsers inject JavaScript into third-party websites. Krause originally said the in-app browsers were injecting the ...

1. Open the URL directly on the browser A quick way to be sure of escaping JavaScript injection via in-app browser links is not clicking on these.

A new online tool named 'InAppBrowser' lets you analyze the behavior of in-app browsers embedded within mobile apps and determine if they inject privacy-threatening JavaScript into websites you visit.

Recent reports detail how some apps inject JavaScript to track what users do in in-app browsers. Now a tool can help detect the presence of these scripts.

The researcher specifically says the JavaScript code does not mean our app is doing anything malicious, and admits they have no way to know what kind of data our in-app browser collects.