For a couple of months or so I have been using the beta flash.
Its not perfect all the time but warns you when the cache needs to be cleaned by acting wonky.
It is also a much smaller download, so who knows whats being included in the full version. Also disable automatic update, selected when installing.
I would uninstall all versions of flash before using this, also check to make sure nothing is calling home adobe reader and IE is a major culprit there. Shutdown all unnecessary startup programs. Usually you can do this with msconfig or task manager.
Get and use ccleaner, it's free and safe. In options, include, add the following directories, where it says YOU use your information for your computer and current user:
C:\Users\YOU\AppData\Roaming\Macromedia\Flash Player\*.*
C:\Users\YOU\AppData\Roaming\Adobe\Flash Player\*.*
Uninstall all the browsers you have installed trying to find a good meter, IE cannot be uninstalled but its fine when not running, all the others are calling home when not in use.
After all this I can pretty much use any browser, but avoid Chrome and IE. They call home to much and any server lags on their end will wreak havoc on your meter I'm sure.
Are you using a 32 or 64 bit machine? Right click computer in control panel, system type =?
Match the browser type. If you have a 64 bit system use a 64 bit browser.
Browsers:
Palemoon My choice has a 64 bit version
Comodo
Firefox has a 64 bit version
I did not like maxthon, meter was fine, but had privacy concerns.
Also play in full screen is much better, higher processor priority is given, you have to exit in and out of full screen to chat.