Show HN: CalmTab a clean Firefox start page with container based Workspaces

Hi HN. I built a new Firefox homepage extension called CalmTab and would love some feedback. I work across multiple clients and found my cookies constantly clashing, so I built a homepage that includes a feature called Workspaces which opens grouped tabs in separate containers with one click. It also includes world clocks, sticky notes, daily quotes, and a simple layout.

This is my first time building a Firefox extension and I would appreciate any thoughts on the approach, the UX, or areas that could be improved.

Add on link: https://addons.mozilla.org/en-GB/firefox/addon/calmtab/