Hello, Late but for those who stumble on the same issue: It’s not possible to control script injection other than with port exclusion. The “Additional / Network / Inject script into web traffic to interact with web pages” will *not* stop AV (currently 2020) from inserting scripts hosted on gc.kis.v2.scr.kaspersky-labs.com. But you can use the “Monitor selected ports only” and remove ports 80, 443 (possibly 8080 if necessary), and select “Do not scan encrypted connections”. It is unfortunate that this problem, reported since 2015 at least, is ignored by Kaspersky. Good luck. That makes sense because disabling script injection does not fix the issue. I am glad someone has an idea of what is going on. I think I will just unsubscribe, stop using kaspersky unless tech support is able to help out. I will post followup if I find a solution.