The problem of existing browsers poorly handling usage-cases with hundreds, perhaps thousands of tabs open.

So is it just a new way of organizing tabs? I'm not sure what the issue is with browsers having many tabs open, besides it being difficult to navigate between them (and obviously resource consumption)

Difficult navigation is enough of a problem. Seeing just a single letter of the page title because you have a hundred tabs open makes finding tabs really hard and cumbersome.

> besides it being difficult to navigate between them

That's it. Hierarchical pages makes it really easy to contextually browse or what I call "immutable browsing" which is never just clicking, but always ctrl+clicking links to never change your current page.

Also, the one thing many people don't realize is how easy it should be to close dozens of pages. A simple drag across the close buttons in Doogie (or drag over which ones you want) helps close swaths of pages.

It's solving the problem that Firefox has nuked the tree-style-tabs browser extension in FF57. It also highlights a good reason to write a separate browser as opposed to implementing it as an extension for one of the big player's browsers, because you can guarantee they'll break your extension within 3 years.

Tree Style Tab is being ported to a WebExtension:

https://github.com/piroor/treestyletab/issues/1224#issuecomm...

Will nuke. Firefox is at 55 currently.

It actually seems very useful for people who like to research, and organize their current stream-of-research into tabs.

The analogy of it being an IDE is telling. You can think of some browsers as the equivalent of being a text editor, some as intermediates (Sublime Text), then this as an IDE.

I'm excited for it.