Right now I rely on TabsOutliner when using Chrome (which I only use for work). It lets me keep 400+ tabs open and stay sane. I like it so much that I've paid for it 3 times, and would have paid a 4th time but it seems you can't anymore, and I fear it's abandoned.
In any case, this is how I work. I use browser tabs as a kind of short- to medium-term memory. I open a bunch of things, and keep them open for as long as I might plausibly need them. To me this is just normal. I don't know how anyone lives with only 10 or 20 tabs open, or a 50 tabs in a single window. How could you remember anything? But without TabsOutliner or something like it, this becomes a sprawling mess, because the browser gives you no native means to search it, or "zoom out".
Unfortunately TabsOutliner isn't available for Firefox, which I use when I have a choice. So seeing SavaOS promote Chrome... I lose a little interest right away. If it doesn't work in Firefox it's not worth getting excited about, because Chrome as a piece of software treats me like an enemy and I don't like that. So: support Firefox!
That said, if SavaOS gives me the capability to organize my tabs, maybe treat them like files I can put in directories etc etc, that sounds awesome and I want to try it. At the very least maybe it's better than TabsOutliner.
But seriously: Firefox!