firebug: how to cd to an iframe

use one of these commands:

 cd(frames[0]) 
 cd(frames["iframe_canvas"])

and

 cd(top)

to return to the main window.

Still, due to a bug this currently doesn't work on cross-domain-iframes (http://code.google.com/p/fbug/issues/detail?id=3893). There are two test cases where you can test your evironment for both cases:

• https://getfirebug.com/tests/content/commandLine/cd.html (same domain, works for me: FF 3.6.13, FB 1.6.2)
• http://getfirebug.com/tests/issues/3893/issue3893.html (cross domain, fails)

Another possible source of surprise: if you execute more commands at once the cd command seems to not have an effect for the directly following commands:

 >>> cd(frames[0]); location.href;
 ["Current window:", Window cdFrame.html]
 "https://getfirebug.com/tests/content/commandLine/cd.html"
 >>> location.href
 "https://getfirebug.com/tests/content/commandLine/cdFrame.html"

In Chrome there is a dropdown at the bottom top* of the javascript console that lets you switch to a different frame to execute javascript in. Works cross-domain too!

_{*Updated 2/10/14: In more recent versions of Chrome, this dropdown has been moved from the bottom to the top of the console.}