Improving Firefox Security Through about:config

I'm using Firefox 5.0.1

I'm looking to improve Firefox security through about:config.

So far I have altered:

geo.enabled = false
network.dns.disableIPv6 = true
network.prefetch-next = false
browser.cache.disk.enable = false
browser.cache.memory.enable = false
browser.cache.offline.enable = false
browser.sessionstore.max_tabs_undo = 0
browser.sessionstore.max_windows_undo = 0
browser.sessionstore.resume_from_crash = false

Planning on implementing:
add:
"New" -> "Integer" -> "network.dnsCacheExpiration" as the name and "0" as the integer value
"New" -> "Integer" -> "network.dnsCacheEntries" as the name and "0" as the integer value

What other about:config tweaks are available to help improve security for Firefox?

 

How does removing your cache improve security?

 

I assume he's trying to only have it in memory. I'm not too familiar with Fx variables but disabling cache.memory sounds counter-productive.

Also if you're disabling IPv6 because of the Win7 IP leak when using a proxy, it was fixed in SP1, otherwise there's no need to disable it.

 

There were certain attacks involving the cache in Firefox. I'll have to Google to review which article as I didn't save the address and it was some time ago.
Here is one place:

Bohdizazen: Internet Privacy


If you feel they are not a security risk then please explain your position.

 

It is quite possible I accidentily included browser.cache.memory.enable based on the other two recomendations, at some point thinking they were linked. But...

http://www.infohole.com/blog/computing/firefox-cache-location/

browser.cache.memory.enable
Caching Off: With caching turned off, no memory will be set aside giving you more free.

Setting it so does not appear to be harmful.

Also:

Browser-Cache-Poisoning.Song.Spring10.attack-project.pdf

Your thoughts and suggestions appreciated.

 

Analyzing Information Flow in JavaScript-based Browser Extensions - PDF

Altering security.xpconnect.plugins.xyz seems more complicated then most of the other about:config adjustments, requiring a list be used for each plugin for its proper functioning.
Will messing with this in about:config improve Firefox security or are there other methods to improve JSE security?