Why not just bookmark them. It’s not like it’s going to stay in memory. It’s going to reload the page when you go back anyways.
The bigger problem with bookmarks for me is the inability to manage relationships. With the Tree Style Tabs add-on in Firefox and vertical tabs in Orion, child tabs are opened in a tree. It codifies my search context and makes tab management quite easy. The analog in bookmarks is using folders, but they’re rather tedious to create when bookmarking and I can’t think of any browser that will auto-create nested folders when bulk bookmarking tabs.
Absent that, it’s considerably easier to leave the tabs open. The tree will even be restored when the browser starts should I need to reboot.
I can't understand the tab thing when history is pretty easily accessed in modern browsers... but it's common enough not to judge too harshly.
It is like I have a huge desk with papers that appear to be strewn across it, but actually are organized and the layout is important to my train of thought.
Support different groupings, regexp renaming, persistent original date order + additional last used orders, etc. (I have a longish list of wants).
I want better autofiltering on history (eg: dump all map url's that proliferate on every slight viewport change; dump all (say) HN links unless explicitly saved; save type XXX, quesry type YYY's for saving, etc) and overall more thought on easy organisation and "restoring" a particuar view of the internet from X time ago.