[ SmokeDetector | MS ] Url-only title, blacklisted website in body, blacklisted website in title, body starts with title and ends in url, link at end of body, +6 more (795): nutritionless.com/mira-essence/ by oadutphp on askubuntu.com
[ SmokeDetector | MS ] Url-only title, bad keyword in body, bad keyword in title, blacklisted website in body, blacklisted website in title, +4 more (692): pilpedia.com/keto-ignite/ by zabmukh12 on askubuntu.com
[ SmokeDetector | MS ] Url-only title, bad keyword in body, bad keyword in title, blacklisted website in body, blacklisted website in title, +5 more (792): pilpedia.com/keto-ignite/ by mutuleh on askubuntu.com
dupe, from the comments it seems OP just doesn't know how to install GNOME extensions, not a problem with that specific extension mentioned in the question
[ SmokeDetector | MS ] Bad keyword in body, pattern-matching website in body, potentially bad asn for hostname in body, potentially bad ns for domain in body, potentially bad keyword in body, +2 more (199): Keto Now helpsupplement by Hadozsroff on askubuntu.com
[ SmokeDetector | MS ] Url-only title, bad keyword in body, blacklisted website in body, blacklisted website in title, body starts with title and ends in url, +4 more (693): pilpedia.com/total-fuel-keto/ by zalemai12 on askubuntu.com