I'm using Firebug on Firefox 3.6.3 for Mac.
I want to use Firebug to view GET and POST parameters being passed. I have Firebug open at the Net > XHR tab. The panel says 'Net panel activated'.
Yet if I then go to google.com and do a search, nothing appears in the XHR tab. (All the HTML, CSS etc appears fine in the other tabs.)
Where can I see the GET parameters being passed to Google in Firebug?
Use the All tab in the NET panel
POST parameters can be seen in the NET panel. The first line is the page and if you click the down arrow to expand it, you can see the parameters under the section called "Post"
GET parameters can be seen in a similar way, on the expanded NET tab, its the section called "Params". Additionally, GET parameters will always be part of the url. It's the set of parameters after the ? in the URL.
Not sure how to do this in Firebug, but you could use Fiddler to see the entire request and response.
Within Firebug you can also select DOM->document->forms->Your Form Name
All of you input variables and their post values will be listed under there.
I hope that helps.
来源：https://stackoverflow.com/questions/2953289/firebug-how-do-i-see-get-parameters