I'm still running Windows 7. I've noticed that the memory usage by Firefox just keeps growing and growing the longer I use it. I do have a bunch of tabs open, but probably only use about 1/3 of them a lot. When I relaunch Firefox with all the same tabs the memory usage starts off around 500,000 KB, but after using if for the day it grows to almost 2,000,000 KB.
I've had Firefox go unstable on me quite a few times towards the end of the day - usually if playing YouTube videos. I'm wondering if it might be because of this ever increasing memory usage. What's causing it to keep increasing memory usage as time go on? Is there a setting I can make that will help prevent it from doing this? Below is a snap-shot of Windows Task Manager showing how much memory Firefox is using.

I've had Firefox go unstable on me quite a few times towards the end of the day - usually if playing YouTube videos. I'm wondering if it might be because of this ever increasing memory usage. What's causing it to keep increasing memory usage as time go on? Is there a setting I can make that will help prevent it from doing this? Below is a snap-shot of Windows Task Manager showing how much memory Firefox is using.
