Does anyone have this issue were firefox becomes slow if left open for a long time. In my case after a couple of weeks rendering becomes slow and when I use youtube for example if is laggy, just trying to change volume taka few second to show the volume bar. It also happens to my laptop at work. I have around 30 tabs open.
Oh, the 20 tabs thing is perfectly reasonable. But I’m one of those crazy people who completely shuts down his computer every night, including closing my browser. Been using computers for too many years to trust a browser to not leak memory.