Firefox doesn't actually load all tabs on startup (only the selected one) and it allows you to unload tabs, so you can be fairly efficient about it.

That said, it can easily use a couple dozen GiB after an intense research session or a few weeks of regular usage but that's manageable with even just 32G and, as I said, you can always unload tabs (or restart; effectively unloading all tabs) to reduce usage at any point.

its part of a website called swissmilk where you can find recipes and general information about nutrition. It's in german so maybe it helps since your account is on a .de domain :)

Yeah? Visualize the tab and what's on it, then visualize yourself clicking the X, and see it disappear. Then visualize yourself back in the tab you want to be on.

I'll be reading bedtime stories to my kid and realize my mind has wandered to a work matter, for example, and then I do those exercise.

If have too many tabs open at once, I get paralyzed.