Hi @merk84,
1. "To create a folders of entries, drag one entry onto another. Click the folder to expand it and view the entries it contains. When a folder is expanded, entries can be managed exactly as described above.
To return to Speed Dial, click the "x" on the top right of the folder's window.
To edit a folder's title, right-click the folder and select Edit Title. Type your desired name into the text field and click OK.
To rearrange entries inside a folder, expand the folder and drag-and-drop entries to the desired location, or move them out of the folder.
To delete a folder — and all of its entries! — right-click the folder and select Delete Folder - the source link.
2. For that purpose you can try the "Open in (background) tab" extension.
:cheers: 😉