A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, KBin, etc).
If you wanted to get help with moderating your own community then head over to !moderators@lemmy.world!
Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration), Search Lemmy
For instance, this one (link to a post to !memes@reddthat.com): https://reddthat.com/post/20260613
Pasting it in your search bar should give you this kind of results:
You can then click on it to access the post from your instance (in this example, lemmy.zip: https://lemmy.zip/post/16918691)
A website can access another site's cookies if the first party domain explicitly allows them, which would need to happen in this case. Sure, admins would have to allow which sites can access the cookie. But at least that burden is placed on admins vs the users.
Browser extensions arent secure and many mobile browsers dont support them, so that wouldnt be a proper solution. A lot of users use Lemmy on their mobile phones.