What happens when you open Google in a non-standard browser like Opera Mini? You get the following snippet.
Sorry, but this browser does not support web word-processing.
Please see our system requirements page for a list of supported browsers.
If you are working to fix problems with a specific browser and would like to bypass this check, just add ?browserok=true to the end of the Google Docs url.
Please note that it is a violation of intergalactic law to use this parameter under false pretenses, so don’t let us catch you at it.
And, it won’t work very well — really.