I don't remember which vendors were causing it, but yes, many inject their own JS, causing things to break and exceptions to be thrown. Here's a StackExchange

I don't remember which vendors were causing it, but yes, many inject their own JS, causing things to break and exceptions to be thrown. Here's a StackExchange question: "How to disable Kaspersky Antivirus javascript injection?" [0]. And on Reddit: "PSA: Kaspersky injects remote javascript into all your pages. Even secure ones." [1]. [0] https://superuser.com/questions/981959/how-to-disable-kaspersky-antivirus-javascript-injection https://superuser.com/questions/981959/how-to-disable-kasper... [1] https://www.reddit.com/r/privacy/comments/3frjqw/psa_kaspersky_injects_remote_javascript_into_all/ https://www.reddit.com/r/privacy/comments/3frjqw/psa_kaspers...