This tip I credit to Dr. Dave Garaffa (Thanks Dave!). To finally drop Internet Explorer permanently in favor of Chimera, I needed to gain access to my Citibank site which requires 128 bit encryption (which Chimera has), but the site refused to recognize the browser. Citibank has claimed for the past 6 months that they are working on it, but hey life is finite.
To change the user agent in Chimera, which effectively allows you to masquerade as an "accepted" browser, you need to add a line to the prefs.js file located in your user's Library -> Application Support -> Chimera -> Profiles -> default -> XXXXX.slt folder, where the X can be anything. First quit Chimera if open and then open the prefs.js file in your favorite text editor and add the line
user_pref("general.useragent.override", "Mozilla/4.0[space]
(compatible; MSIE 5.2; Mac_PowerPC) - Internet Explorer 5.2, Mac");This should be all one line, spaces as written here (convert the "[space]" insert to an actual space character when you remove the line break). Save the file, open Chimera and you can now gain access to the Citibank site (and presumably others that demand a known (yet inferior!) browser.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20021219062444948