browser and screen information
browser information (http header)
| accept header | text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 |
| accept charset header | |
| accept encoding header | br,gzip |
| accept language header | en-US,en;q=0.5 |
| userAgent header | CCBot/2.0 (https://commoncrawl.org/faq/) |