- First, bookmarks - if you bookmark something and close the tab, the bookmark stays there forver. If you bookmark something that you know you won't need later

- First, bookmarks - if you bookmark something and close the tab, the bookmark stays there forver. If you bookmark something that you know you won't need later (e.g. after you finish researching something), then it adds a mental burden of having to clean it up later. When a lot of them accumulate, it's really hard to recall why exactly they were added in the first place and whether each one of them should be now removed or not. - Open tabs are the opposite - if you close them, they're gone forever. So once you no longer need a certain tree of tabs (e.g., like above, you've finished researching something), you just dispose of the whole tree; if there's anything particularly valuable in there, you can add it to bookmarks. So, e.g. if I'm doing house renovation I may have trees of tabs with hundreds of open tabs in them while researching something. Same when coding, if I'm investigating a particular topic I may have tons of open tabs that will eventually get closed all together. In some rare cases, I keep a tab or a tree of tabs open just so I don't forget to navigate back to it in the foreseeable future (at which point it will likely get closed).