Horse Browser
Nyxt Browser already has this feature
This strikes me as an extension I'd pay for. But not a whole browser.
I've been using a similar workflow with Sideberry on Firefox. It does work semi-good for research, though it still needs some manual organizing.
I think tree-tab browsers need some kind of scripting to automate curation: a new youtube.com tab will close itself and refresh the main one; tabs can have an exponentially decaying score reset on interaction, which puts them into the "Archived" and then closes them at certain thresholds, with some domains having a higher base; a simple Bag of Words classifier can group your tabs when called; etc. Otherwise you just waste too much time periodically organizing your persistent 400 tab window.
Alternatively, add the multi-row tabs CSS hack for Firefox; it has a the side-effect of half-breaking tab re-ordering, forcing you to CMD/CTRL+click thereby solving the trails problem. 5 or 6 rows of tabs during a research session is not uncommon, conveniently chronological.
Or simply use Waterfox instead.
Trails is a great concept. However wrong monetization strategy.
Paying for a browser is like paying for air to breath. Sure, a feature may be worth to pay but sold as a whole browser product? A user is using so much of other extensions too and the compatibility for websites (agent check) isn't discussed either.
Paying for a browser ?! No way, José (and I'm ADHD)
I bookmark to the main screen, or screens, and use an idivdual main screen page as project, also the browser (stoutner) I use, lets each bookmark become a folder that can be labeled as to content subject, and then create domain settings for each bookmark.ie: no the audio and video will not start yelling and flashing just because I want to read the headlines. as to paying for any software, only when there are returns possible, and reselling personal copys is easy......and automatic upgrades and updates to any branded software.ie: it's actualy property, not some kind of mad cross between a lotery ticket and an indenture agreement
Their marketing appeals to me. The browser looks good!
As a private person, I don't want to, and refuse to subscribe to software. Therefore I will forget about it.