Way to debug CORS errors

Which version of Chrome are you using? The latest versions have become much better at reporting CORS issues. For example, I am using Chrome version “32.0.1700.14 beta”, and when I visit this page, I get the following error in my console: Request header field X-Foo is not allowed by Access-Control-Allow-Headers. This information is only available … Read more

Chrome Headless puppeteer too much CPU

my default args, please test it and tell me if this run smoothly. Please note that –no-sandbox isn’t secure when navigate to vulnerable sites, but it’s OK if you’re testing your own sites or apps. So make sure, you’re know what you’re doing. const options = { args: [ ‘–no-sandbox’, ‘–disable-setuid-sandbox’, ‘–disable-dev-shm-usage’, ‘–disable-accelerated-2d-canvas’, ‘–no-first-run’, ‘–no-zygote’, … Read more

Filter only the requests with errors – Google chrome network

I found my own way to it so it’s not official and other approaches may exist. Option 1: Filtering HTTP Status Codes You can filter responses by their status code — Here’s a useful list with all HTTP’s Status Codes. AFAIK this filtering feature has been working for years. It’s through the status-code property (you … Read more

Is there any way to keep Developer Tools open when debugging a Chrome Extension?

There are two ways to accomplish this. Click on the Dev Tools popup so the window is focused and then press F5. This will reload the popup and Dev Tools, and will not cause the Dev Tools window to close. If that doesn’t work for you, go to chrome-extension://extensionid/path/to/popup.html on a separate tab on Chrome. … Read more

Chrome content scripts aren’t working: DOMContentLoaded listener does not execute

You are injecting your script after the event you are listening for fires (in this case, DOMContentLoaded). Thus, any code that you have in the listener will not be executed, because the event never fires after you have added your listener. In Chrome extensions and Firefox WebExtensions, when specifying a time for a content script … Read more

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