Web Browser Error Messages Explained

Your Connection Is Not Private

Your browser is warning you that the website you are trying to visit may not be secure. This is your browser protecting you from potential data theft.

Certificate Error — Navigation Blocked

The website's security certificate has a problem. Your browser is blocking it to protect you from a potentially unsafe connection.

This Password Has Appeared in a Data Breach

Your browser has detected that a password you saved has been leaked in a known security breach. Someone else may know this password.

This Site Can't Be Reached

Your browser cannot connect to the website at all. This could be an internet problem on your end or the website might be down.

DNS_PROBE_FINISHED_NXDOMAIN

Your browser cannot find the website because the domain name does not exist or cannot be looked up. Think of it like looking up a phone number that is not in the directory.

This File Was Blocked — Download May Be Dangerous

Your browser thinks the file you are trying to download might be harmful. It is protecting you from potentially dangerous files.

ERR_CONNECTION_REFUSED

The website you are trying to visit refused your connection. The website's server is either down or not accepting visitors right now.

404 Not Found

The specific page you are looking for does not exist on this website. It may have been moved, renamed, or deleted.

Too Many Redirects — This Page Isn't Working

The website keeps sending your browser in circles, like being sent back and forth between two doors. The website needs to fix this on their end.

Mixed Content Warning

The website is trying to load some elements (like images) over an insecure connection. This is not your fault — it is a website issue.

Pop-up Blocked

Your browser stopped a new window from opening. Most pop-ups are ads, but sometimes they are needed for things like signing in or downloading files.

Cookies Required — Please Enable Cookies

The website needs your browser to accept "cookies" (small data files) to work properly. Cookies help websites remember you.

Aw, Snap! — Out of Memory

Your browser ran out of memory and the page crashed. This usually happens when you have too many tabs open.

Adobe Flash Is No Longer Supported

The website is trying to use a technology called Flash that no longer works in modern browsers. The website needs to be updated.

A Script on This Page Is Not Responding

Part of the website's code is not working properly. The page may still work, but some features might not function.

Confirm Form Resubmission

You are trying to refresh a page where you previously submitted information (like a form). Refreshing might send that information again.

Storage Quota Exceeded

Your browser has used up its allotted space for storing website data. Clearing your browsing data will fix this.

Camera/Microphone Access Blocked

The website wants to use your camera or microphone (like for a video call) but your browser is blocking it.

Notifications Blocked for This Site

You previously blocked this website from sending you notifications. If you want to receive them now, you need to change the setting.

500 Internal Server Error

The website you are trying to visit has a problem on their end. There is nothing wrong with your computer or connection.

403 Forbidden

The website understood your request but is refusing to let you access this page. You do not have permission to view it.

Access Blocked — CORS Policy Error

The website has a technical issue preventing it from loading content properly. This is a website developer problem, not something wrong with your browser.