The web extension requires the "tabs" permission (https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs) so that it can determine the hostname of the current tab to send to the service along with the "contextMenus" permission (https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/user_interface/Context_menu_items) so that you can easily open a link. Available services: - Blacklight (https://themarkup.org/blacklight/) - Blocklist Tools (https://blocklist-tools.developerdan.com) - Categorify (https://categorify.org) - crt.sh (https://crt.sh) - CryptCheck (https://tls.imirhil.fr/) - DNS Blacklist (https://dnsblacklist.org) - Hardenize (https://www.hardenize.com) - Internet.nl (https://en.internet.nl/) - KeyCDN (https://tools.keycdn.com/geo) - Mozilla Observatory (https://observatory.mozilla.org/) - Njalla (https://check.njal.la/dns) - Qualys SSL Labs (https://www.ssllabs.com/ssltest/) - Sucuri SiteCheck (https://sitecheck.sucuri.net/results) - Security Headers (https://securityheaders.com/) - Shodan (https://www.shodan.io) - SSL-Tools (https://ssl-tools.net/webservers/) - Talos Reputation Lookup (https://talosintelligence.com/reputation_center/lookup) - Tracking The Trackers (https://trackingthetrackers.com/) - urlscan.io (https://urlscan.io/) - VirusTotal (https://www.virustotal.com/) - Webbkoll (https://webbkoll.dataskydd.net/) - Whois.com (https://www.whois.com/whois/) Examples of just the hostname that is sent: - "https://duckduckgo.com/?q=privacy" -> "duckduckgo.com" - "https://www.openrightsgroup.org/blog/2015/responding-to-nothing-to-hide-nothing-to-fear" -> "www.openrightsgroup.org" --- Certificate icon icon by Icons8