Currently I only have 42 tabs, of those only 36 are loaded. But sometimes I can have hundreds. Some users of my Grasshopper extension ( https://addons.mozilla.org/en-US/firefox/addon/grasshopper-urls/ ) work with thousands of tabs.
Depends. I let the number grow until it's on the order of a few thousand usually (enough to where it's bogging down browser performance) and then I make it a point to explicitly save a Freshstart session and then kill all my browser windows and start over. Right now I have 336 tabs open across 19 windows.
At some point it’s faster/easier to search again than to find a tab among hundreds or thousands.
I probably have between 3 and 20 open typically. Once it’s starts getting beyond that I get pretty anxious to finish whatever has be opening so many tabs, so I can clean things up and reset before moving on to the next thing.
Usually one. If I'm actively resarching something, it can go up to a dozen or so temporarily. In that situation, I'll also usually have multiple instances of the browser going to segregate topics. I tend to prefer multiple windows over multiple tabs because it makes it easier for me to navigate and keep more than one thing visible at a time.
I've been considering the multi-window approach, to leverage the system's taskbar, which is natural to use, but I don't know if I'd open more than 2-3 windows, since it would fill the space quickly (unless I use a taskbar that groups items).
I mostly use Firefox except for some cases where Chrome is better suited since it can be more compatible with media and intensive applications. Do you use terminal browsers for emergencies, like when you only have access to a TTY?