Lol I don't think I ever had 300 tabs open. Must be a nightmare to navigate haha. I believe I also used to have 6 browsers, but with Donut it now fluctuates at around 10 profiles, depending on what I need to do.

In terms of tabs, I rarely have over 30 tabs open. The moment I feel like I'm getting overwhelmed with the number of open things, I close all tabs that I don't absolutely need.