Uncaught Error: SECURITY_ERR: DOM Exception 18 in Google Chrome and
Error: uncaught exception: [Exception... "Security error" code: "1000" nsresult: "0x805303e8 (NS_ERROR_DOM_SECURITY_ERR)" location: file:///some directory Line: 46] in Mozilla Firefox
Solution: The solution is quite simple. Just go to command prompt and change directory to where your html page is for example for running WebGL/Simple/Test.html u do this on cmd prompt
c:\> cd D:/WebGL/Simple/
Then simply type this
D:/WebGL/Simple>python -m SimpleHTTPServer
This opens up a local http server, let this cmd prompt run. Now go to the web browser firefox/chrome and type this in the address bar to load the webpage
This should run the WebGL code fine. Once u r done, you can press Ctrl+C to terminate the http server. I hope it helps others from the pain which I had to bear.