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Here's an addon that allows you to sandbox sites like Facebook. https://addons.mozilla.org/en-US/firefox/addon/priv8/ https://addons.mozilla.org/en-US/firefox/a

• greggman 12y ago
  That's not a sandbox by the same definition has Chrome. Sandbox = CPU sandbox, not just cookie isolation. To achieve that in Firefox will require massive re-writing of lots of code to basically do all the stuff Chrome was built to do. Chrome doesn't allow the CPU process running the webpage to access any OS services or hardware. All access to those are in other processes that do tons of validation that what the page is asking for it should be allowed to access. That way, even if there's a code execution bug it's unlikely to be able do any damage.