I use the following hardware: i5-2500k SSD for OS, applications and app cache 16 GB RAM I use Crunchbang, a rather lightweight Debian-based distro with Openbox. My issue is that Firefox (including the most recent 11 release) will slow down and become unresponsive for continuous 5-10 second bursts when opening many (100+?) tabs. This makes clicking and/or text input a work of frustration. The problem only goes away once enough tabs have been closed to get below a certain threshold (I'm unclear as to what the sweet spot is). At the same time, Firefox is not consuming all that much in the way of CPU or RAM (viz. above, my system has more to give than Firefox seems to want to take). I don't think I've seen Firefox consume more than 2 GB, though I wouldn't mind if it consumed a few times that if it would improve my browsing experience. I searched high and low, and most of what I find is on how to improve performance on constrained systems, with an emphasis on how to reduce RAM use. I believe my question is rather the opposite: I would like Firefox to use as much (RAM, CPU) as it can and should in order to give me a smooth, stutter-free experience. Does anyone have pointers on this? I've tried installed the fasterfox lite plugin, but it doesn't help this problem. Network speed is hardly a problem, as I am on a VDSL2 line with net speed of 20-25 mbps and latency very low.