Mozilla Connect

Sorry, but really funny to articulate freeriding and other concerns. I think Firefox at least allow custom blocklists just like Brave shields or Vivaldi since a complete integration is a daunting task. 

I think brave shields and Vivaldi as blocker are good examples. You can add custom blocklists yourself. 

I think other threads related workspaces should be merged here. https://connect.mozilla.org/t5/ideas/workspaces-%C3%A0-la-opera/idi-p/66 and https://connect.mozilla.org/t5/ideas/persistant-tab-groups-workspaces/idi-p/23419  

This is very important feature missing in Firefox. I think that It should not be so difficult to bring bergamot to iOS.