…do they mean while you’re on their website, or do they mean these sites will install spyware in on your computer so that everything you do on your computer thereafter will be going straight to federal law enforcement?

Anytime you log into any .gov website (like this IRS link),
https://sa.www4.irs.gov/sso/login/IDME?op=signup&lang=,
you'll have to create a government account (called ID.me)! that you'll use every time you log into any .gov site.

Creating this account, you'll have to create it using your phone or a computer with a camera built in,
because the government will use your camera to take a selfie of you and compare it with the picture on your ID (Drivers License or Passport) that you have to upload.
This is the excuse, but what they're really doing with your selfie that they took, is create a facial recognition photo.
The SW used to take your selfie is designed to calculate curves & undulations on your face, that they can't retrieve from your ID.
https://www.id.me/biometric

Think about the implications of that!

Call your own rep and senators to ask if they are acting to guarantee that Federal websites are NOT illegally collecting information. If asked why be worried about this? Ask why, given the crimes this administration is committing in plain sight, they WOULDN'T be worried about this and want to make sure it is not happening?

If there is an email or fax contact, perhaps either email the following link or print and fax
https://thedreydossier.substack.com/p/i-found-a-second-votegov-and-its

(BTW, faxes are rarer and are more likely to be noticed. But many no longer make the fax number in their DC or state office public).

And if you are ambitious, contact the chair and ranking member (and others, particularly if you are also a constituent) of the House Committee on Oversight and Government Reform (https://oversight.house.gov/subcommittee/full-committee/) and the Senate Committee on Homeland Security and Governmental Affairs (https://www.hsgac.senate.gov/).

These are the committees that should be VERY concerned about illegal data collection by federal websites. When you contact a chair or ranking member, make sure you make it clear to the staff you speak to that you are contacting them in that capacity -- not as a constituent.

access to the site. I wasn't about to enter my email address and decided to see if I could find the Contact page on my own. I cleared out all but the exact website URL and added /contact. Luckily for me, that was the correct one so I was able to email my compaint.

I'm sure all the info will also be fed into Palantir's surveillance program/database.