Content of the Firebug lite bookmarklet src:http://getfirebug.com/firebuglite

Bookmarklet: Firebug Lite

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1. Open up a Terminal Window
2. cd /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.2.sdk/Applications/MobileSafari.app
3. sudo "/Developer/Applications/Utilities/Property List Editor.app/Contents/MacOS/Property List Editor" StaticBookmarks-en_US.plist

That will open up the plist file for editing (and saving). Then you just need to make the following changes so your Property List Editor screen looks like this:

1. Right-Click on the "Root" line.
2. Select "Add Row" from the Context Menu. That will become "Item 0" in the list.
3. Change the type of "Item 0" from "String" to "Dictionary"
4. Click on the triangle next to "Item 0" to open it up.
5. Right-Click on "Item 0" and select "Add Row"
6. For the new Row (under "Item 0") set the Key = "Title" and the value = "Firebug Lite"
7. Right-Click on the new "Title" row (that you just added) and select "Add Row"
8. For the new Row (under the "Title" row) set the Key = "URL" and the value is the content of this gist

Save the file and restart the iPhone simulator

src: http://www.jamagination.com/jeff/blog/2011/01/19/getting-firebug-lite-working-iphone-simulator-or-how-add-bookmark-safari-iphone