Accessing the console log commands via chrome extension

I'm looking to override the existing console commands via my Chrome extension - the reason for this is I wish to record the console logs for a specific site.

Unfortunately I cannot seem to update the DOM, this is what i've tried so far:

// Run functions on page change
chrome.tabs.onUpdated.addListener( function (tabId, changeInfo, tab) {
    var s = document.createElement('script');
    // TODO: add "script.js" to web_accessible_resources in manifest.json
    s.src = chrome.runtime.getURL('core/js/app/console.js');
    s.onload = function() {
        this.remove();
    };
    (document.head || document.documentElement).appendChild(s);
});

console.js

// Replace functionality of console log
console.defaultLog = console.log.bind(console);
console.logs = [];
console.log = function(){
    console.defaultLog.apply(console, arguments);
    console.logs.push(Array.from(arguments));
};

// Replace functionality of console error
console.defaultError = console.error.bind(console);
console.errors = [];
console.error = function(){
    console.defaultError.apply(console, arguments);
    console.errors.push(Array.from(arguments));
};

// Replace functionality of console warn
console.defaultWarn = console.warn.bind(console);
console.warns = [];
console.warn = function(){
    console.defaultWarn.apply(console, arguments);
    console.warns.push(Array.from(arguments));
};

// Replace functionality of console debug
console.defaultDebug = console.debug.bind(console);
console.debugs = [];
console.debug = function(){
    console.defaultDebug.apply(console, arguments);
    console.debugs.push(Array.from(arguments));
};

The script runs successfully with an alert().

The goal for me is to access console.logs - but its undefined which means I haven't gotten access to the DOM, despite injecting a script.

If not possible, even a third party integration would be helpful i.e. Java or C?

Any thoughts would be greatly appreciated :)

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