It's also very much expected behaviour for many users, to be able to reopen tabs and I'd consider it a bug, if I weren't able to.
What's more, Chrome has you covered for actual privacy concerns.
When you use Chrome Sync, Google gets your browsing history and bookmarks in readable form (and they declare that they use these in their privacy policy). Which means US intelligence agencies, as well as befriended intelligence agencies from other countries, also have access to your data.
When auto-filling data, Chrome will fill out all input fields on a page, even ones that you cannot see. So, dodgy webpages may very well have your address, phone number etc..
Chrome's extension store also has a massive malware problem. Mozilla has human reviewers to prevent this and also requires extension to get user consent for internet connections that are not necessary for the functioning of the extension (telemetry, ads).
To sort of mitigate this problem, Chrome doesn't allow extensions to run in Incognito Mode, which however also locks out privacy enhancing extension. Firefox also blocks tracking scripts and similar in Private Browsing mode by default.