Mozzarella

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Close Original Tab

Adds an extra tab context menu item that lets the user duplicate a tab (or a set of highlighted tabs) into a container and immediately closes the original as requested by this Bugzilla issue.

Beware that switching an existing tab to a container might be considered a privacy issue. Websites can still fingerprint browsers which is not prevented by containing tabs and technically the same browser opening a website in several different sessions is a leaked information about how its being used. I highly recommend to do your research. Personally I don't consider it an issue.

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