Which color profile to use, if any, for web?

Hi,
For years, I've been accustomed to saving JPGs for web use by including the sRGB color profile.
However, I now realize that IE either discards color profiles, or forces a new one on them (took me this long to notice because while I always proof-check my code through IE, I never paid close attention to image colors 'til now). Meanwhile, Firefox actually uses the ones the JPGs were saved with, so I see the exact same thing in Photoshop as I do in Firefox.
Anyway, as I was saying, I just noticed the colors are very different in IE. In fact, trying to match a hexadecimal color value with a JPG is pretty much impossible as long as both IE and FF interpret JPG colors differently.
As a test, I tried saving a JPG with no color profile included. Interestingly, it showed up near identically in both FF and IE.
Which begs the following question :
Why the hell have I been using color profiles all this time? :-(
Another observation I made is that the Adobe RGB color profile more closely resembles the No Color Profile state than sRGB does (sRGB is a lot less saturated color-wise).
So what is it I need to do now?
1. Go over the entire website and re-save all images with no color profiles.
2. Go over the entire website and re-save all images with Adobe RGB color profile.
The goal here is that I want my hexadecimal color values to match what's on the JPG (for example, when a gradient ends and goes to a flat color state, I'd like to be able to fill that region with a hexadecimal color value instead of using more images needlessly... but for this to be a seemless transition, everyone needs to agree and match).
Thanks.

I've been doing something completely different.
To the extent that a color needs to match or be like a color that is a background on my website (which is the usual issue I run into with color differences), I make a .PNG or .GIF file and use transparency. That way I don't get the problems associated with color profiles and web safe colors.

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