Dec 5, 2018 · 3 Normally, using fetch from a website to send a request would include a referrer header in the request depending on the referrer-policy On a chrome extension background script, I have tried with referrer as client and referrerPolicy as unsafe-url, …

Sep 18, 2012 · Fetch () vs. XMLHttpRequest () fetch() was created specifically for service workers and follows a broader web trend away from synchronous operations. The XMLHttpRequest() API is supported in extensions outside of the service worker, and calling it triggers the extension service worker's fetch handler. New work should favor fetch() wherever ...

Dec 5, 2018 · Hi, I was planning to use origin and referer to determine if a request comes from my extension and optionally server the requests in my server. However, I noticed that using fetch in background like the code below to send a cross-origin request, i) the header would be set to null instead of chrome://**chrome-ext-id**.

Mar 20, 2025 · We would like to investigate allowing extensions to set these headers directly in the fetch API (from a suitably-trusted caller), rather than needing to separately monitor and modify the request via declarativeNetRequest or webRequest. This results in simpler, cleaner code for extensions and a significantly more performant operation.

Jun 26, 2025 · Change HTTP referer settings: Chrome The HTTP referrer header can be very revealing in the context of online tracking. Learn how you can change the policy in Chrome to force the browser to include the minimum information in this header or even block it entierely.

Learn how to effectively use the `declarativeNetRequest` API to set the `Referer` header in fetch requests for your Chrome extension built with Manifest V3.-...

Jul 18, 2010 · If you want to use an existing Chrome/Firefox/Edge Extension, you can use Requestly which allows you to modify request and response headers. Have a look at this snapshot:

May 19, 2014 · I attempt to find an existing Referer requestHeader. If found, I set the header's value to the given URL. If the header is not found, I push it. I've done some reading on the "handlerBehaviorChanged" method exposed through chrome.webRequest.handlerBehaviorChanged, but I'm still unsure if this is something which …

Sep 17, 2023 · But there’s one way you can use to modify the auto generated referer header in chrome, which is by modifying the browser history. The trick is very simple. When sending a request to another domain, the browser sets the value of the Referer header to the current page url set in the browser’s address bar.

When sending cross origin requests using the fetch API the origin request header is being set to null instead of the chrome://xxxxx that I was expecting. Using fetch in both the background.js context as well as the injected iframe context result in the same behavior. When I use XMLHttpRequest instead it sends the expected origin header. Is there some control in the …

Aug 10, 2019 · This is a feature request for fetch () in extension scripts (not content scripts) to actually send a cross-origin referrer URL header. Currently it is intentionally not sent and just silently ignored, but that's a normal web fetch ().

195 There is a restriction to access response headers when you are using Fetch API over CORS. Due to this restriction, you can access only following standard headers: Cache-Control Content-Language Content-Type Expires Last-Modified Pragma When you are writing code for Google Chrome extension, you are using CORS, hence you can't access all headers.