I have Firefox 15.0.1, and I have just recently started getting notices of high memory usage. When I check the task manager, it shows "Memory (Private Working Set)" is in the 2,734,000 K range. The first page always hangs with the spinning green circle, and it takes about 2 minutes for Firefox to "load" to the point where I can actually browse and click on links. During that time, it shows "(Not Responding)", and greys out when anything is clicked on.
I've even tried restarting in safe mode, and the memory usage is the same.
Is this amount of memory usage normal? Are there any other ways to reduce it?
I have the same problem. After clearing all the histories and caches it still hangs. Firefox does NOT go well with Youtube, it hangs, stutters and creates a shadow covering the viewing area. The only way to resolve it is to close/reopening the browser but until it repeats again. Very frustrated in Firefox lately. I am forced to use IE9 and so far it is VERY stable!