Imports github.com/MaxHalford/halfgone github.com/chromedp/cdproto/css github.com/chromedp/cdproto/emulation github.com/chromedp/cdproto/input github.com/chromedp/cdproto/page github.com/chromedp/chromedp github.com/soniakeys/quant/median Standard library imports bytes context embed flag fmt html/template image image/color/palette image/gif image/jpeg image/png io io/ioutil log math math/rand net net/http net/url os os/signal runtime strconv strings syscall time