What would help me in reducing tabs/windows is good session management. I want per-window sessions that I can close and restore with their own history. Each w

What would help me in reducing tabs/windows is good session management. I want per-window sessions that I can close and restore with their own history. Each window would then have a purpose, be helping me work on a project. Instead I have history that searches across all my work (news, python development, shopping, etc) and if I want to pause on some of it, without just leaving the tabs open, I have to manually delete and recreate the bookmarks to represent my current state.