[Feature request] Add ability to open URL list in specific account container

[michaelroland]

Firefox supports multi-account containers for quite a while now.

Currently, it seems that the URLs list plugin does not support these containers. Instead when listing URLs it list the URLs of all tabs (regardless of their container). Similarly, when opening a list of URLs, they are opened without assigning them to any container.

It would be great to have the following features:

• Select a target account container when opening a list of URLs.
• Selectively export only the URLs assigned to a specific account container (i.e. filter the URL list for tabs that are assigned to a specific account container).