You found a typo, why not flag it to be fixed?
That was a superb idea,but the site is dead. Anyway it would work only if this extension were very famous. I sincerely doubt they will visite the grammarlert site (now dead), they are busy with other things, and they probably consider emailing easier. And the problem is that this can of tool can be hijacked to simply let useless comments to the owners. I'm not convinced.
Very handy to be able to make content suggestions to site owners without mucking up their comment sections or trying to find their contact information. Thanks!
Firebird
https://eangel.me
https://scribens.com
Kyle Apfel
andrejselivanov749
roshin.dev
https://proofreadbot.com
campbel3837
ianfox
https://grammar.com
wanhose
joncazier