One of the most common roadblocks when scraping the content of web sites is getting the full contents of the page, including JS-generated data elements (probably, the ones you are looking for). So, when using CEFSharp to scrape a site, reading the content of the page with:

string pageSource = await _browser.GetSourceAsync(); 

will not return the JS-generated parts of the page. But the following code fragment will:

var jsResponse = await _browser.EvaluateScriptAsync(@"document.getElementsByTagName ('html')[0].innerHTML");
if (jsResponse.Success)
{
    string pageSource = jsResponse.Result.ToString();