Its probably something simple like you naming the file 'icons16.png' instead of 'icon16.png', or using windows and hiding extensions so your file is really ''. I also have links below of how the site appears if the box is checked or unchecked.Īny help on this situation would be greatly appreciated. Sounds like its reading the manifest and looking for your file. Is there any negative impact on the site if we leave that box unchecked?įor the time being, we left the box checked so if you go to (in Chrome), you’ll see the issue we’re referring to. We’ve narrowed it down to where this issue occurs if we have a check in the box for “Load WebP or AVIF in supported browsers?” If we leave that box unchecked, PNGs become transparent again in Chrome.Īny idea on why this is? We already have the Shortpixel plugin installed on the site. We’ve made sure Chrome was up to date, refreshed and flushed DNS, tried computers with different IPs, this issue is only isolated to Chrome. Learning more about CSPĬheck out the Content Security Policy reference or take a look at more CSP Examples.We’re noticing on our homepage and header (credit card logos in the headers, category buttons on homepage) PNGs are not showing as transparent. Hover over Help in the dropdown menu and click on. Click on the three-dot menu in the top-right corner. 1 maybe this will help you 6 Ways to Save WebP Images as JPG and PNG Zina at 20:44 1 The response headers: content-disposition and content-type as you can check in the Dev tools are whats influencing the browser. So you may see CSP blocking a resource due to differences in implementation, or browser support as well. Move to the right side and turn the toggle off for Use hardware acceleration when available. If Chrome loads images, you need to look at your installed extensions. Open thethree-dot menu and select New Incognito window, or press Ctrl + Shift + N. The best way to test this is to use incognito mode. Safari support is pretty good, but it may not support the latest features of CSP. A conflicting browser extension might stop it from loading images. Firefox, Chrome and Edge all have very good support for CSP. Not all browsers support CSP, for example Internet Explorer doesn't support it. Why is it blocked in some browsers but not others? You can see a similar example of CSP blocking an image in our CSP Browser Test. Check out this CSP reference for a full list of all the directives and values you can use. There are CSP directives for each of the types of resource you want to load (for example img-src, script-src, style-src, etc). So if we wanted to load such an image, we would have to alter the policy to something like this: Content-Security-Policy: default-src 'self' img-src 'self' In FireFox the image request blocked by CSP doesn't show up in the Network tab, but it will output a message to the developer tool console, such as:Ĭontent Security Policy: The page’s settings blocked the loading of a resource at (“default-src”). Refused to load the image '' because it violates the following Content Security Policy directive: "default-src 'self'" You would also see a message like this output in the Chrome Developer Tools Console: That image would be blocked by CSP, and we may see blocked:csp in the Network tab of Chrome Developer tools. So if we had an image loading from a url like: So if we put that CSP policy on a page located at: then with this policy we can load resources (images, js, css, etc) from * The 'self' value here tells CSP that the browser should only fetch resources from the same origin as the page that set the policy. 1 Like lenihanbob (Rob) April 9, 2018, 4:07pm 3 Thanks DBear, here’s a link to the example: I don’t haven’t any chrome errors on export DBear April 9, 2018, 4:32pm 4 Ok. This includes all types of resources such as images, css files, javascript files, etc. The default-src directive controls what URLs are allowed to be used for fetching resources on the page. With this policy the default-src directive is set to the source list value: 'self' Here's a very simple CSP policy that uses the default-src directive: Content-Security-Policy: default-src 'self' Developers can set CSP using either a HTTP response header, or with a HTML meta tag. It might show up in the status column as (blocked:csp)ĬSP stands for Content Security Policy, and it is a browser security mechanism. You may be seeing blocked:csp in Chrome developer tools when the browser is trying to load a resource. Why does CSP block the loading of resources, and what does blocked:csp mean? What does blocked:csp mean?
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