Currently I am using Firefox as default browser, I have no issue to naviguate with it, but I have a little limited memory (8GB, 6.8 available) and Firefox takes a lot of RAM for nothing big, the more I use it in the time, the more it "eats" the RAM. I want to know which is the lightest browser to use jupyter notebook to save my RAM for computations on my dataset for instance.
Try 32-bit Chrome or Firefox, it may significantly lower memory usage.
Remember, it is surprisingly difficult to estimate physical memory consumption of given app: https://dzone.com/articles/windows-process-memory-usage-demystified
Also - unused RAM is wasted RAM. Do not blame browser for taking and using, what's available. When overall memory usage will raise, browser can drop some internal cache and free that memory.
You might be better off restructuring your code to not run heavy computations within notebooks.
I found https://towardsdatascience.com/introducing-jupytext-9234fdff6c57 this helful in the past, or https://github.com/minodes/pynb to create a simple .py file from a notebook on the fly.
That way i can switch out the dataset / some parameters and run heavy computation separately from jupyter and not launched from a browser.