One word about all this tweaking stuff.
I use Firefox since years and all this stuff exist since years.
I don't know what Internet speed others have but fast sites load within a second here.
How fast can it be? Seeing a site before i click a link?
Changing stuff like "pipelining" or "max-connections-per-server" can make it slower.
Not all servers like this. In the past there where allot of sites that don't load completely if you set it.
Most of this settings are already higher on default then they where in the past cause Internet connections getting faster and pc have more power.
If you set "max-connections-per-server" high and your connection is slow or your PC is slow then you make sites loading slower. Some sites use content delivery networks (CDN). That means that for example pictures and style sheets come over another domain. If "max-connections-per-server" is set to 10 and the website uses a CDN then your browser/PC has to handle 20 requests. If you set it to 25 you have 50 requests.
Also some servers getting slower if they get to many requests overall or from one IP.
Imagine 2500 visitors double there requests - thats like 5000 visitors.
And it makes no sense at all to lower the RAM usage if you have allot of RAM. The RAM usage is what makes a program fast. And it really makes no sense to use a 64bit browser and doing this.
The main reason for 64bit is that you can use more RAM.
Browser cache in RAM-Disk is something i tested the first time before 8 years and i also tested it again a couple of times. There is no speed improvement on a fast modern PC.
Fast websites lot in 1-2 seconds on a fast connection with a normal HDD so there is no bottleneck.
Your HDD is faster then your Internet connection.
I can download a file with full speed on my 100.000 Internet connection to an old HDD.
Most of this stuff does nothing or makes things worse.
It's like all this tunning software and Windows registry hacks.
They do nothing or make things slower.
Over the last 15 years I tested them all more than one time and XP works best with the default registry. I started stopping waisting my time with stuff like this when Vista was released.
If stuff does not work then make a fresh installation and work with it for some days and see if your problems are gone.
And i use TabMixPlus, Session Manager and 30 other add-ons and have no problems.
+1 too all of this I use faster fox with optimal settings and its just fine no issues