Cool idea and it looks nice, but it doesn't integrate well with Firefox Containers (one of the best features in FF) which is a huge neg for me.

The tabs get stored as a workona.com redirect, so the container plugin doesn't know how to handle until the redirect opens then you end up with 2 tabs and you have to manually close them. May as well just use a bookmarks folder.

Also have to manually set workona.com as the home page.

This addon has a lot of potential, but until it works with containers I don't like it.