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.
I only have around 30 open and I don’t turn off the laptop, after a while firefox becomes sluggish and I have to restart it.
You should try that nightly build for troubleshooting purposes
Also, because it forces you to restart the browser every night.
Have you tested with specific websites? Could it be a tab has some have JavaScript running constantly that’s causing the issue?
I haven’t tested it at my home laptops, but my work laptop all tabs become slow. I have to restart it every time.