HN Request to any browser devs: Master Tabs

Any browser devs out there, I would like to ruqest a feature: Master Tabs.

I may or may not be an out of the norm user; I typically always have 25+ tabs open at all times in my browser.

These can range from many HN, Reddit, Email, Forum, News etc tabs that I am reading - If an article or thread is really long - I won't read it all in one sitting. Instead - I leave it up for even days on end, until I am ready to close it.

Sometimes I leave tabs open for days at a time just so I clikc on it ~once a day to remind myself about that item|news|article|thread|thought...

I would like to have Master Tabs within my browser to group them together (natively - not through colored tabs or some other thing - but if there is something amazing that will do this - please let me know) and have savable sessions.

Actually - think of it as Multiple Desktops - specific to my browser, but the 'desktop' can be a definable category.

I'd like to be able to slide a whole browser window any direction to open that category space, bookmark/tag them and then keep them together.

I'd like to be able to have a "searching for work" type of session. A "news", "tech" whatever session and I can group these and file them and save them accordingly.

Bonus points if you can make it via a hosted portal in which I have an encrypted connection whereby any .gov and .mil IPs are explicitly blocked/dropped :)