[Greasemonkey] A question from the ignorant

[Andrew Bell]

 > If the "bandwidth saving" means blocking inline HTML, not external files
 > linked in to the web page, then there is no way to dothat without knowing
 > the exact byte ranges that have to be downloaded.

The particular page I want to apply greasemonkey-style clean-up to is an 
online game, where each move is a new page, with a random new ad.  The 
ad itself isn't the issue, it's the poor general layout of the page. 
Even on decent-sized screens, it can require scrolling to see important 
info.  I have modification code that improves things, but the page 
initially displays without the mods, and I can at times accidentally 
click on the wrong control as a result. (Although I may be 
misremembering; I may only have done that with Turnabout on IE.)  Even 
if I don't misclick, I'm still chasing a moving target.  It's not an 
interactive game, but it is a long one, so there's a real benefit to 
even small improvements.  Ideally, I'd also like to replace some of the 
graphics with smaller equivalents.

Thus I was curious if there's anythin along the lines of greasemonkey 
that could help, whether it would require Firefox source hacking, etc.

 > As for not rendering what you're going to remove, you'd have to edit the
 > source before Firefox rendered it. This is both icky and hard
 > (impossible?) to do.

Could you elucidate on ickiness and hard/impossibleness?  My guess is 
that Firefox starts rendering before it gets the entire page, and GM 
really needs to work on the full page, but that is just a guess.

A system where the page doesn't start displaying until after the 
original page is completely loaded and the GM script run would probably 
do all I need.

Andrew Bell