It would be nice to support the following: - Enable/Disable history - Enable/disable Tracking protection - Clear data on close That would allow Private Browsing to be a container (with Disable history, enable TP, and clear data on close). I also find it useful to be disable history, but not have the data cleared on close. It seems like private browsing gives me the latter, and container tabs give me the former. Container tabs would be more useful if they could do both at the same tabs.

Additionally, the ability to set domains (top level, subdomains, specific TLDs) to always open in a specific tab would be awesome too. For instance, you set dropbox.com to always open in a "storage" container so that any link you click while in Firefox to dropbox.com will always open up in the storage container automatically.

Bulk change per https://bugzilla.mozilla.org/show_bug.cgi?id=1401020