Disabled on google and not working?

I am running Firefox 140.13.0esr on Linux. I noticed you have to turn on for sites that are "untested". I went to google.com, and noticed it was disabled by default. Should google be one of those default sites it's been tested against? I turn it on, and it doesn't grammar/spell check anything. I am running harper v.2.8.0. It is working here on github though.

No file or test is identified. First reproduce the report in Firefox 140.13.0esr on Linux with Harper 2.8.0, comparing google.com after enabling it with GitHub where checking works. Done means the Google behavior is explained and the reported default-site or checking problem is resolved or documented with a regression check.

Written by the indexing model from the issue text.