Chrome Extension To Redirect To Url With Parameter

I'm attempting to create a Chrome extension which will add a parameter to the end of a URL if the URL matches a given pattern (*://*.mydomain.com/s/*). Below is the manifest file a

Solution 1:

1. Use debugger - click your extension's background page on chrome://extensions page and switch to the Sources panel.
2. To obtain the url use onBeforeRequest's callback parameter
3. Check if the url is already modified.

---

chrome.webRequest.onBeforeRequest.addListener(
    function(details) {
        return {
            redirectUrl: details.url + 
                (details.url.indexOf("?") == -1 ? "?" : "") +
                (details.url.indexOf("&style=gridview") == -1 ? "&style=gridview" : "")
        };
    },
    {urls: ['*://*.mydomain.com/s/*'], types: ['main_frame']},
    ['blocking']
);