selectService():BaseService {
        let url = 'None';
        chrome.tabs.getCurrent((tab?:Tab) => {
            if (typeof tab !== 'undefined' && typeof tab.url !== 'undefined'){
                url = tab.url;
            }
        });
        if (url.includes('site1')) {
            return Service1;
        } else if(url.includes('site2')){
            return Service2;
        } else {
            return Service3;
        }
    }