I had built a Chrome extension which does this.
Note: I built this for just 2 sites - just for the heck of it - by no means it's professional quality™. Please don't flame me for crappy code :)
Edit: Updated to manifest v2, which brings in certain additional restrictions.
manifest.json
{
"name": "URL Redirect",
"version": "0.2",
"description": "Checks URL and redirects as required.",
"background": {
"page":"bg.html"
},
"manifest_version": 2,
"content_scripts": [
{
"matches": ["http://*/*", "https://*/*"],
"js": ["content.js"]
}
],
"permissions": ["tabs"]
}
bg.html
<html>
<script src="redirect.js"></script>
</html>
redirect.js
chrome.extension.onRequest.addListener(function(request, sender) {
chrome.tabs.update(sender.tab.id, {url: request.redirect});
});
content.js
var pattern=/\bBlocked/;
var viewtext_base_url = "http://viewtext.org/article?url=";
var newurl;
if (pattern.test(window.document.title)) // if it matches pattern defined above
{
newurl = viewtext_base_url + encodeURIComponent(window.location.href);
chrome.extension.sendRequest({redirect: newurl}); // send message to redirect
}
To install this, create files with filenames as mentioned above the codeblock.
![enter image description here](https://cdn.statically.io/img/i.sstatic.net/CK8YJ.png)
Once all 3 files are created, Click on Chrome Menu → Tools → Extensions. Click the "+" on Developer Mode. Click on Load Unpacked extension and point to the directory where the files are stored.
![enter image description here](https://cdn.statically.io/img/i.sstatic.net/y5Zas.png)
Edit the files are required, and uninstall and reinstall the extension as mentioned above