I was so excited to see this and it did not disappoint. I've been using versions of Group or Spaces extensions since Firefox had a built-in option way back in the day. As a web designer/dev, I spend most of my day in Brave, and I use Spaces to group projects so I can keep tabs organized and closed until I switch to that project. It worked well, but those were technically separate windows with groups of tabs, which could be annoying at times.

With TabExtend I was able to:
- Create a secondary workspace for another business to keep those projects separate
- Use different categories for different column sections (I can view all Research items at once, or I can view all Projects at once - discourages multitasking)
- Save power, because technically only one window is open, vs. stacks of windows
- Open Brave on my second laptop and see all the same projects/categories

I haven't tried sharing a workspace yet, but I'll probably end up using that with my business partner. I'm not sure how much I'll use to-dos or notes, but I really like the option for browser-specific reminders that aren't worth putting in my PM system.

The only thing this is missing compared to the Spaces extension is the ability to see closed windows in a certain space. That was a nice way to find recently searched/closed items on a certain project, although I didn't use it often.

Also, as a designer, I will NOT use a product that is badly designed. This is clean, user-friendly, has shortcuts and the emojis/titles for columns are helpful. One of the best purchases I've made on AppSumo recently (and I purchase... a lot).