Add-ons, Extensions and CSP Violations: Playing Nice with Content Security Policies
You know what I really like? A nice, slick, clean set of violation reports from the content security policy (CSP) I run on Have I Been Pwned (HIBP). You know what I really don't like? Logging on to Report URI and being greeted with something like this: This blog post is about how add-ons and extensions in browsers cause CSP violations like the ones above and how they should be dealt with. Some brief background first as I'll be sharing this post with a bunch of folks for which this may be new: A CSP is a response header or meta tag that allows you to declare a policy for your website declaring what sorts of content can be loaded...