[Someone1234]

That sounds exactly like "pulling a Levandowski."

But also, no, because I have a simple rule: Don't store personal data on company property (including logins/session cookies). When I leave every night, if I never got access to that PC again it shouldn't matter.

I do occasionally log into public websites using personal credentials. But the way the browser is configured, they're ephemeral (meaning if the browser is closed/PC powers off, they no longer exist; this is all trivial with via Firefox's config pro-tip: Set browser.sessionstore.resume_from_crash to false).

As to taking stuff with me: Memories. I highly doubt I'd ever want to read inter-company email years later even if I could, I cannot see the nostalgia value there. Plus it is illegal.