Change Chrome 4xx Page
You can customize the error page with webNavigation API. Add an event Listener for onErrorOccurred event and update relevant details.
Check sample code as a reference.
Demonstration
manifest.json
Registered background page and added all relevant permissions to manifest file.
{ "name": "Customize error page", "description": "", "version": "1", "manifest_version": 2, "background": { "scripts": [ "background.js" ] }, "permissions": [ "webNavigation", "<all_urls>" ], "web_accessible_resources": [ "page.html" ]}background.js
Redirected to our custom Page in case of any error, you can customize this to desired level.
//Adding a Listener to Error Occured Eventchrome.webNavigation.onErrorOccurred.addListener(function (details) { // Updating the browser window with desired URL chrome.tabs.update(details.tabId, { url: chrome.extension.getURL("page.html") });});page.html
Some trivial code
<html> <style> body { background:yellow; position:absolute; } </style> <body> <div style="top: 200px;position: absolute;left: 500px;width: 500;font-size: 40px;">This is a Nice Description</div> </body></html>Reference
Go to options, privacy settings, and uncheck the box:
"Use a web service to help resolve navigation errors"
Detailed instructions here.